What has the US done so far to the Syrian civil war?

The U.S. has engaged in various actions throughout the Syrian civil war, primarily aimed at combating ISIS and providing support to opposition groups. This has included airstrikes against ISIS positions, the deployment of special forces, and the provision of humanitarian aid and training to vetted Syrian rebel groups. Additionally, the U.S. has imposed sanctions on the Assad regime and its allies in response to human rights violations and the use of chemical weapons. Diplomatic efforts have also been undertaken to seek a political resolution to the conflict.