The War of Galactar started as a mere investingation of a happening off of the earth.
Turned into a large battle between the revengerists and the people not on earth sort of.
Ended when (hero) destroyed some object influencing the whoel thing.
ISSUES
The Revengerists: War of Glactar Issue #1
The Revengerists: War of Galactar Issue #2
The Revengerists: War of Galactar Issue #3
The Revengerists: Into the Mystery Issue #834