You can of course declare war, but you can also send gifts,
offer peace treaties and do a couple of other things.
Not exact matches
Spielberg
offers a couple of gory glimpses of the battlefield, to remind us of the terrible cost of the civil war, and of the moral conundrum of Lincoln's tactics, which involve delaying a
peace treaty until his amendment is passed.
...» Butler claimed the mansion belonged to him because he was a Moorish American National, and he
offered paperwork «with references to a 1787
peace treaty and the Vienna Convention on Consular Relations.»