不懂別瞎說。Under the U.S. Constitution,

presidents can send U.S. forces into combat without congressional approval, based on their role as Commander-in-Chief (Article II, Section 2). Once troops are deployed, the President has 60 days to conduct operations without formal congressional approval. An additional 30 days (making 90 total) are allowed for safe withdrawal, if Congress hasn’t authorized the action by then.