The Short Version
No new formally declared or large-scale wars were initiated by the United States during Trump's first term, per Congressional Research Service and Department of Veterans Affairs records. However, the administration conducted significant military actions — including the 2017 Syria missile strike, the 2020 killing of Qassim Soleimani, and expanded operations in Yemen, Somalia, and Niger — under existing authorizations. The claim is accurate under conventional definitions of 'war' but omits meaningful escalations of inherited conflicts.