The battle is over and Henry now has the opportunity to rethink all that has happened.
He feels bad about running away and about deserting "the Tattered Soldier."
However, he feels good about everything else, like stealing the rebel flag and destroying the Death Star.
He realizes that he, like all men, is a mixture of good and bad, weakness and strength. He realizes that now "he [is] a man" (24.31). (Really, this time. That other scene when he thought this exact same thing was just a practice run.)
Henry thinks that because of his experiences, his soul is changed and he can now leave behind the "red sickness of battle" (24.33).
Also, the sun comes out, as a little red-headed orphan once predicted.