Weary, on the other hand, is so bundled up and protected that he can imagine himself safe at home telling his true war stories.
The irony is that Weary is still in the middle of a war as he's imagining his war stories.
Here is Weary's war story: he and his anti-tank gunner buddies fight like hell against a big German attack, but everyone is killed except for Weary.
Weary falls in with two scouts. The three shake hands all around and call themselves the Three Musketeers.
But then this damned college kid comes along who doesn't know what the hell he's doing. So the Three Musketeers have to help the college kid survive against all odds.
In real life, Weary is going back to look for Billy.
Weary can't hear anything going on around him, though, because he is caught up in his personal fantasy: an officer is congratulating the Three Musketeers and one of the scouts asks the officer to promise that wherever they are stationed next, they will be together.