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US-Taiwan Cooperation · Full chronicle and history

2026-11-10
On November 10, Taiwan's Representative to the US Alexander Yui signed an agreement with the US government. Starting November 11, US federal officials will be stationed in various Taiwan government departments on a regular basis for exchange and learning.
Location: Washington · Importance IV · Verification: Reported · View causal chain →
2026-10-21
A delegation composed of leaders of state legislatures from the southern region of the United States met with officials of the Ministry of Foreign Affairs in Taiwan, exchanging views on economic and trade, agriculture, and national security cooperation.
Location: Taipei · Importance III · Verification: Verified · View causal chain →
2026-10-06
The first batch of US F-16 Block 70 (Vipers) fighter jets has arrived in Taiwan. Representative to the United States Yu Ta-jui (Robert Tsao) expressed encouragement over this, and indicated that the delivery of subsequent fighter jets and the accelerated delivery of previously purchased equipment will continue to be advanced.
Location: Taiwan · Importance IV · Verification: Verified · View causal chain →
2026-10-06
A delegation led by US Senator Michael Bennet and Representative Brendan Boyle arrived separately in Taiwan for visits, meeting with senior Taiwanese officials.
Location: Taiwan, China · Importance III · Verification: Verified · View causal chain →
2026-10-05
Taiwan Foreign Minister Lin Chia-lung visited Phoenix, Arizona, to attend the unveiling ceremony of the city's Taipei Economic and Cultural Office, deepening Taiwan-U.S. technological and economic and trade cooperation.
Location: Phoenix City · Importance III · Verification: Verified · View causal chain →
2026-10-04
In his October 4, 2026 program, Hu Liren predicted that signs such as US Department of War personnel stationed in Taiwan indicate that US-Taiwan diplomatic relations could be upgraded in the second half of 2026 or 2027.
Location: United States · Importance III · Verification: Reported · View causal chain →
2026-10-03
On October 3, Taiwan's Liberty Times, citing reports by senior military officials, said that the U.S. Department of Defense's Office of the Under Secretary of Defense for Policy and the Defense Analysis Center plan to each send one representative to be stationed long-term at the headquarters of Taiwan's Ministry of National Defense, assisting with policy coordination and combat capability assessment. The relevant cooperation project is scheduled to run from 2026 to 2028, with a budget of approximately NT$470 million.
Location: Taiwan · Importance IV · Verification: Reported · View causal chain →
2026-10
The U.S. Department of War (Department of Defense) has, for the first time, dispatched policy and assessment personnel to be stationed long-term at Taiwan's Ministry of National Defense, marking the open and closer nature of U.S.-Taiwan military cooperation.
Location: Taiwan · Importance IV · Verification: Reported · View causal chain →
2026-10
According to a report on October 4, a US-Taiwan cooperation program worth about $14.77 million, running through 2028, plans to have US personnel work at Taiwan's Ministry of National Defense, participating in defense policy, force assessment, and war gaming.
Location: Taiwan, China · Importance III · Verification: Reported · View causal chain →
2026-10
Taiwan's office in Phoenix, Arizona was officially unveiled in Phoenix, Arizona, with Arizona Governor Hobbs and Taiwan Foreign Minister Lin Chia-lung attending together.
Location: Phoenix City · Importance III · Verification: Verified · View causal chain →
2026-10
Taiwan's Representative Office in the United States held a Double Ten National Day reception at Twin Oaks in Washington, and Representative to the U.S. Yu Dalei stated that U.S. arms sales to Taiwan will continue to advance.
Location: Washington, United States · Importance II · Verification: Verified · View causal chain →
2026-09-29
U.S. Senate Armed Services Committee Chairman Roger Wicker met with Taiwan's representative to the United States, Yu Ta-lei, on September 29, discussing U.S. security commitments to Taiwan and the situation in the Indo-Pacific.
Location: Washington, United States · Importance III · Verification: Verified · View causal chain →
2026-09-25
In response to the mention of the Flying Tigers and the Chinese Communist Party's history of the War of Resistance during the Trump-Xi meeting, the Government of the Republic of China issued a statement on September 25, stressing that the People's Republic of China was founded in 1949 and did not exist during the War of Resistance, that it was the Republic of China that fought shoulder to shoulder with the United States, and that the Chinese Communist Party cannot erase the historical contribution of the Republic of China.
Location: Taiwan, China · Importance III · Verification: Verified · View causal chain →
2026-09-23
Mitch McConnell led multiple Republican senators in sending a letter to Rubio and Hegseth, demanding the prompt use of the 300 million dollars in military financing and 1 billion dollars in security cooperation funds allocated for Taiwan, and to push forward the 14 billion dollar arms sales to Taiwan.
Location: Washington, United States · Importance IV · Verification: Verified · View causal chain →
2026-09-17
According to a Reuters report on September 17, Japan and Taiwan are stepping up communication with the U.S. amid concerns that Trump might sacrifice Taiwan's interests for economic and trade commitments during the anticipated September 24 meeting with Xi Jinping. Japan has already dispatched officials to the U.S. to secure a meeting between Prime Minister Sanae Takaichi and Trump, and Taiwan has also expressed its position to the U.S. side.
Location: China · Importance IV · Verification: Reported · View causal chain →
2026-09-17
According to commentary, a large U.S. arms sale order to Taiwan is currently being implemented, and is seen as one of the factors affecting whether Xi Jinping will visit the United States as planned.
Location: United States · Importance IV · Verification: Reported · View causal chain →
2026-09-13
Trump said in Ireland on September 13 that he was not worried about Xi Jinping canceling the White House meeting scheduled for September 24 over the issue of arms sales to Taiwan; earlier Kyodo News reported that the Chinese side warned that it would cancel the meeting if the US approved new arms sales to Taiwan before the summit, and Trump said he would hold off on approving an arms sale package to Taiwan totaling $14 billion. Taiwan's foreign minister Lin Chia-lung rebutted the claims, saying they were Beijing's cognitive warfare.
Location: 爱尔兰 · Importance IV · Verification: Reported · View causal chain →
2026-09-09
Raymond Greene, Director of the American Institute in Taiwan's Taipei Office, warned at the 2026 Taipei Security Dialogue Forum on September 9 that any conflict in the Taiwan Strait would likely deal a blow to the global economy exceeding that of World War II, and said the Trump administration has made maintaining peace in the Indo-Pacific its top priority, adding that the upcoming U.S.-China summit is an opportunity to advance a strategically stable relationship.
Location: Taipei · Importance IV · Verification: Reported · View causal chain →
2026-09-07
Taiwan establishes a US‑supported cyber unit to hunt hidden military threats. On September 7, the South China Morning Post reported that the Taiwanese military plans to form a “Cyber Threat Hunting Team” to proactively search for infiltrators and backdoors lurking in military networks and critical infrastructure. According to reports, Taiwan’s Ministry of Digital Communications allocated NT$95.93 million in the 2027 budget for forming the team and inviting foreign experts to Taiwan for training... #USA
Location: China · Importance III · Verification: Reported · View causal chain →
2026-09
Taiwan's defense department said that the US government and Congress have repeatedly supported Taiwan's efforts to enhance its self‑defense capabilities. Taiwan will continue to contact relevant US agencies to push for the arms sales to be carried out as scheduled; Zhuo Rongtai expressed confidence in Taiwan‑US relations.
Location: Taiwan · Importance III · Verification: Reported · View causal chain →
2026-08-27
The U.S. and Taiwan signed a Letter of Offer and Acceptance for a military purchase on August 27. Taiwan will purchase 1,554 Altius 700M attack drones and 478 Altius-600 ISR reconnaissance drones from the U.S. company Anduril, with a total value of NT$26.9 billion.
Location: Taiwan · Importance IV · Verification: Verified · View causal chain →
2026-08-19
In 2026, the United States publicly confirmed for the first time that the U.S. Coast Guard and Taiwan's Coast Guard Administration had conducted joint patrols in the Taiwan Strait, releasing operation photos and details, while Beijing barely protested.
Location: 台湾海峡 · Importance IV · Verification: Reported · View causal chain →
2026-08-04
U.S. Republican Representative Michael McCaul has arrived in Taiwan, where he will meet with Taiwanese President Lai Ching-te and deliver a speech on Indo-Pacific security, demonstrating the firm bipartisan U.S. support for Taiwan.
Location: Taiwan · Importance IV · Verification: Verified · View causal chain →
2026-08-04
Lai Ching-te met with Michael McCaul at the Presidential Office in Taiwan and presented him with a medal in recognition of his efforts in promoting U.S.-Taiwan relations and maintaining peace and stability in the Taiwan Strait.
Location: Taipei City, Taiwan · Importance III · Verification: Reported · View causal chain →
2026-08-03
A U.S. bipartisan delegation led by Representative Young Kim has concluded its visit to South Korea, Japan, and Taiwan, during which it reaffirmed U.S. support for Taiwan's self-defense and discussed regional security and supply chain issues.
Location: Taiwan · Importance III · Verification: Verified · View causal chain →
2026-08
Taiwan's National Chung-Shan Institute of Science and Technology (NCSIST) received the DIVE-LD unmanned underwater vehicle system from Anduril Industries in August 2026. It was initially deployed for submarine cable inspection capabilities to prevent sabotage, and subsequently underwent adaptive and customized modifications to meet Taiwan's specific needs.
Location: Taiwan, China · Importance III · Verification: Verified · View causal chain →
2026-08
The American Institute in Taiwan released photos of US Coast Guard vessels sailing alongside Taiwan Coast Guard vessels, demonstrating ongoing cooperation in the field of maritime security.
Location: Taiwan · Importance III · Verification: Verified · View causal chain →
2026-07-30
A bipartisan delegation of U.S. Congress members visited Taiwan from July 30 to August 1, exchanging views with senior Taiwanese leaders on issues such as U.S.-Taiwan relations and regional security.
Location: Taiwan · Importance III · Verification: Verified · View causal chain →
2026-07-29
U.S. company Shield AI and Taiwan's AEHC Technology demonstrated unmanned vessels equipped with AI autonomous software carrying out coordinated formation operations at Dapeng Bay in Pingtung, Taiwan, on July 29.
Location: Pingtung, Taiwan · Importance III · Verification: Verified · View causal chain →
2026-07-23
Former American Institute in Taiwan (AIT) Director Brent Christensen wrote an article on the Brookings Institution website stating that current U.S.-Taiwan relations are at their strongest and most comprehensive point since the establishment of diplomatic ties in 1979.
Location: United States · Importance III · Verification: Verified · View causal chain →
2026-07-17
Mike Korda, a senior U.S. State Department official for Western Hemisphere affairs, was reported to have publicly stated that Washington does not accept the Chinese government's One-China principle and called for advancing relations between the United States and Taiwan.
Location: United States · Importance V · Verification: Reported · View causal chain →
2026-07-06
U.S. Senator Tammy Duckworth arrived in Taiwan for a visit, meeting with President Lai Ching-te and other leaders, and emphasized the importance of the U.S.-Taiwan partnership for regional security.
Location: Taiwan · Importance III · Verification: Verified · View causal chain →
2026-07-02
The director of the American Institute in Taiwan (AIT) Taipei Office, William Brent Christensen, stated that the war in Ukraine shows that drones can change the rules of the battlefield, urging Taiwan to seize the opportunity to build drones into the next generation of its flagship industry.
Location: Taiwan, China · Importance III · Verification: Reported · View causal chain →
2026-07
Hu Zhendong stated that the United States has dispatched military personnel to Taiwan to assist with training, and that Taiwan-U.S. defense cooperation has also extended to planning, personnel training, and the building of defense capabilities.
Location: 台灣 · Importance IV · Verification: Reported · View causal chain →
2026-07
The U.S. State Department pushed back against criticism from China's Taiwan Affairs Office of Raymond Greene, director of the American Institute in Taiwan (AIT), stressing that Greene's remarks fully represent the position of the U.S. government and urging Beijing to stop applying pressure on Taiwan.
Location: Taiwan · Importance IV · Verification: Reported · View causal chain →
2026-07
Han Kuo-yu led a delegation to the United States in his capacity as Premier of Taiwan, where he was received by the U.S. Congress.
Location: United States · Importance IV · Verification: Reported · View causal chain →
2026-07
Some political parties in Taiwan demanded that the defense procurement budget be approved only after the U.S. formal Letter of Offer and Acceptance is delivered; Hu Zhendong said this interrupted the original arms sale process for political reasons.
Location: 台灣 · Importance III · Verification: Reported · View causal chain →
2026-07
Alaska Senator Dan Sullivan posted on social media after meeting with Cheng Li-wun, urging her and the Kuomintang to work with the Democratic Progressive Party to pass Taiwan's defense budget.
Location: United States · Importance III · Verification: Reported · View causal chain →
2026-07
The TACEC Taiwanese American conference was held. Hu Zhendong attended and exchanged views with Taiwanese and American figures, discussing Taiwan-US relations and defense issues.
Location: 美國 · Importance II · Verification: Verified · View causal chain →
2026-07
It is reported that Yu Dalei, director of Taiwan's representative office in the United States, has been active in Washington political circles recently, maintaining contacts with multiple parties.
Location: Washington, United States · Importance II · Verification: Reported · View causal chain →
2026-07-01
The U.S. Congress has extended an invitation for Taiwan region leader Lai Ching-te to visit the United States; Hu Liren believes this is a signal that the United States and Taiwan are gradually establishing diplomatic relations while severing ties with the Chinese Communist Party.
Location: United States · Importance III · Verification: Reported · View causal chain →
2026-06-26
The US Department of State, Department of Commerce, and Department of Agriculture jointly sent a letter to governors and business leaders across the United States, warning that Chinese consulates and embassies are obstructing US-Taiwan interactions and encouraging states to expand cooperation with Taiwan in economic, trade, education, and other fields.
Location: Washington, United States · Importance III · Verification: Official claim · View causal chain →
2026-06-25
Dozens of bipartisan members from the US House of Representatives and Senate met with a cross-party delegation of legislators from Taiwan's Legislative Yuan, led by its President Han Kuo-yu, on Capitol Hill to discuss US-Taiwan relations and defense cooperation.
Location: Washington · Importance IV · Verification: Reported · View causal chain →
2026-06-09
On June 9, Kuomintang legislator Ma Wen-chun asked Taiwan's Ministry of National Defense to explain the number of U.S. personnel dispatched, the number of meetings, and the actual benefits regarding the "Taiwan-US Department of Defense Joint Cooperation Assessment Case."
Location: Taiwan · Importance II · Verification: Reported · View causal chain →
2026-06
The U.S. Department of State, Department of Agriculture, and Department of Commerce jointly sent a letter to all U.S. governors and business leaders, encouraging the expansion of cooperation with Taiwan in various fields and warning states not to succumb to pressure and obstruction from Chinese consulates, noting they can turn to the State Department for assistance if pressured.
Location: United States · Importance IV · Verification: Reported · View causal chain →
2026-06
Legislative Yuan President Han Kuo-ju led cross-party lawmakers to visit the US, meeting with US political figures and exchanging views with TSMC employees to promote deeper US-Taiwan parliamentary cooperation.
Location: Washington, United States · Importance III · Verification: Reported · View causal chain →
2026-06
Taiwanese Legislative Yuan President Han Kuo-yu received a grand reception during his visit to the United States, including appearances by prominent figures from the U.S. Congress showing their support, demonstrating America's support for democratic Taiwan.
Location: United States · Importance IV · Verification: Reported · View causal chain →
2026-05-16
According to data from the Defense Security Cooperation Agency, as of December 17, 2025, the cumulative value of U.S. arms sales to Taiwan under successive administrations stands at approximately $8.7 billion under Clinton, $15.6 billion under George W. Bush, $13.9 billion under Obama, $18.2 billion during Trump's first term, and $8.3 billion under Biden.
Location: Washington, United States · Importance III · Verification: Verified · View causal chain →
2026-05
In May 2026, a delegation of 41 senior executives from U.S. defense firms, led by retired U.S. Air Force General Flynn, visited Taiwan to attend the Taiwan-U.S. Defense Industry Forum, holding discussions on joint weapons development and supply chain integration.
Location: Taipei, Taiwan · Importance IV · Verification: Reported · View causal chain →
2026-01
Congress pre-approved $14 billion in arms sales to Taiwan this January.
Location: United States · Importance III · Verification: Verified · View causal chain →
2024
Utah Representative Candace Pierucci and others have introduced a resolution aimed at deepening friendly relations between Utah and Taiwan, and are actively promoting related legislation.
Location: Utah, United States · Importance II · Verification: Verified · View causal chain →
2024
According to an interview with Miles Yu, the U.S. began in 2024 to help explain externally that UN Resolution 2758 does not involve Taiwan, refuting the CCP's claim that the resolution had already handed Taiwan's sovereignty over to the CCP.
Location: United States · Importance IV · Verification: Reported · View causal chain →
2023
Taiwan's then-President of the Legislative Yuan entered the U.S. Congress, appearing alongside U.S. senators, representatives, and congressional leaders to discuss relations between the United States and Taiwan.
Location: Washington, United States · Importance III · Verification: Reported · View causal chain →
2023
The U.S. House of Representatives passed the Taiwan International Solidarity Act, stating that United Nations Resolution 2758 has been abused and misused to wrongly obstruct Taiwan's entry into the international community. The bill had not yet been passed by the Senate at the time.
Location: Washington, United States · Importance IV · Verification: Reported · View causal chain →
1980
In 1980, the Mutual Defense Treaty between the United States and Taiwan was terminated; since then, the United States has maintained its security commitment to Taiwan under the Taiwan Relations Act and the public pledges of successive presidents.
Location: United States · Importance IV · Verification: Verified · View causal chain →
1979-04
After the Carter administration severed diplomatic relations with the Republic of China and terminated the Mutual Defense Treaty in 1979, the U.S. Congress drew up the Taiwan Relations Act within two to three months, stipulating as domestic law that diplomatic recognition of Taiwan must be jointly negotiated by the President and Congress, and the Carter administration was forced to sign it. Senator Barry Goldwater raised a challenge over the constitutionality of the procedure for terminating the Mutual Defense Treaty, but the court declined to hear it.
Location: Washington, United States · Importance IV · Verification: Verified · View causal chain →
1979-01-01
The United States ended its diplomatic relations with Taiwan and established diplomatic relations with the People's Republic of China.
Location: United States · Importance IV · Verification: Verified · View causal chain →
1969-06
In June 1969, the Nixon administration, in order to improve relations with Beijing and create conditions for the U.S. withdrawal from the Vietnam War, ordered the disbandment of the Seventh Fleet's permanent patrol unit in the Taiwan Strait.
Location: United States · Importance IV · Verification: Verified · View causal chain →
1950-08-04
After the outbreak of the Korean War in 1950, the U.S. Seventh Fleet established the Taiwan Strait Patrol Force. Destroyers and capital ships conducted routine patrols in the Taiwan Strait, deterring conflict and ensuring the strait remained open to international navigation, which laid the foundation for nearly two decades of peace in the Taiwan Strait.
Location: 台湾海峡 · Importance IV · Verification: Verified · View causal chain →
1950-06
After the outbreak of the Korean War in late June 1950, U.S. President Truman declared the Taiwan Strait neutral, blocking either side of the strait from attacking the other.
Location: United States · Importance IV · Verification: Verified · View causal chain →