Pacific Deterrence Initiative

The Pacific Deterrence Initiative (PDI) is a United States Department of Defense framework established in fiscal year 2021 to enhance deterrence capabilities in the Indo-Pacific region and counter the People's Republic of China's growing military assertiveness. Created through Section 1251 of the National Defense Authorization Act for Fiscal Year 2021, PDI functions as a budget display mechanism highlighting targeted investments in military capabilities and infrastructure west of the International Date Line.

PDI represents the largest regional deterrence investment since the Cold War, with congressional authorizations totaling over $40 billion from fiscal years 2021-2024. The initiative was explicitly modeled after the European Deterrence Initiative, which Congress created in 2014 following Russia's invasion of Crimea.