The passing of the Anti-Secession Law, on March 14th 2005, was a reminder that the People's Republic of China has not renounced the use of force against Taiwan. Following the election of Chen Shui-bian in March 2000, the positions of the governments on both sides of the Taiwan Strait have hardened. Beijing demands from Taipei a recognition of the “one China” principle in order to resume dialogue, while Taipei considers the Republic of China in Taiwan to be a sovereign and independent state. This article describes the range of means—including modernisation of the military, reinforced military co-operation with the United States, and increasingly with Japan, as well as restrictions on various forms of exchanges between the two sides— which are used by the Chen Shui-bian government to resist Chinese irredentism. It emphasises the continuity with Lee Teng-hui's security policy, and the new constraints which affect the Taiwanese executive, in particular the refusal by the opposition parties, which control the majority of seats in the Legislative Yuan, to approve the government's plans for arms acquisitions