"Through the fog the army moves on. Pushing through borders. Knocking over obstacles. Killing all enemies. Victory is secured, brothers, march on until the flag rises over the landscape."
The Holy Council
At the end of Halo 2, chief is on the ship with Truth on board.
Why did he escape? He could have 'finished the fight' there!
Even if earth was attacked. I never understood this. I loved Halo 2 btw.