-Sending anti-tank missiles is under discussion, but hasn't happened yet. -Yes, that happened, though they burned a bunch of stuff before leaving. -Only because Congress passed them over his objections with a veto-proof supermajority. -Yes, that happened. -Not really a thing.https://twitter.com/John_Hudson/status/944613178184486913 …
There haven't been additional chemical attacks. The reason's a lot more complicated than those missile strikes. Nevertheless, Trump ordered them, and Assad hasn't used chemical weapons since.