Here's a little question.

The cannon shoots at a brigade in such a wayLetters are units)

A A A A
B B B B
C C C C
D D D D

^
|
|
Can


Sorry for my drawing skills))
So, the question is, if the ball inflicts at least a hit on each of the 4 brigades(as it may due to bounce), in what sequence are these units driven back, and roll for confusion, making way, etc.