We was raised in these war times
Jail also made men in these hard times

from Lil Wayne (Ft. Birdman) – We Don't Lyrics on Rap Genius

Birdman doesn’t literally mean he and Wayne grew up in a war, he means they grew up in the hood, which is so dangerous, it could be referred to as a war.

Also, during these times that Birdman refers to as war (dangerous times in the hood) young prisoners grew up/matured in prison, making them become men.

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