In StarCraft II, what is the name of the first campaign released in the trilogy?

The first campaign released in the StarCraft II trilogy is Wings of Liberty. Blizzard Entertainment launched it on July 27, 2010, as the Terran-focused opening chapter of the sequel.

Wings of Liberty follows Jim Raynor and his rebels as they oppose the Dominion and confront the return of the Zerg threat. Unlike the later campaigns, its main playable faction is the Terran, although Protoss and Zerg units appear throughout the story and missions.

The trilogy continued with Heart of the Swarm, which centers on Sarah Kerrigan and the Zerg, and Legacy of the Void, which focuses on the Protoss. Wings of Liberty was also sold as a standalone release, making it the entry point for many players who had not played the original StarCraft.