美军圣诞节突袭尼日利亚，特朗普政府有何考量？

Core Viewpoint - The Sahel region has become a major center for global terrorism, with the U.S. conducting military operations in Nigeria against ISIS militants, marking a significant shift in U.S. foreign policy under President Trump [1][3]. Group 1: Military Actions - On December 25, the U.S. launched a "powerful and deadly" strike against ISIS in northwestern Nigeria, confirming a security cooperation and intelligence collaboration with the Nigerian government [1][3]. - The U.S. military's African Command initially released a statement regarding the strikes but later removed references to acting at the request of Nigerian authorities [3]. - The Nigerian Ministry of Foreign Affairs confirmed ongoing security cooperation with the U.S. to combat terrorism and violent extremism [3]. Group 2: Regional Terrorism Context - The Sahel region has seen a significant increase in terrorist activities, with over 50% of global terror-related deaths occurring there [3][4]. - Extremist groups in Nigeria are active in the northwest and central regions, frequently engaging in kidnappings and violent attacks, leading to substantial casualties and property damage [4]. Group 3: U.S.-Nigeria Relations - Historically, the U.S. and Nigeria have maintained a close partnership, with Nigeria being a key military ally and the second-largest trading partner in Africa [5]. - Recent tensions arose from Trump's administration imposing tariffs and freezing foreign aid to Nigeria, which has complicated bilateral relations [5]. - The U.S. aims to re-establish its military presence in West Africa, particularly in Nigeria, following troop withdrawals from neighboring countries, to enhance its regional military capabilities [5].