First shoot the horse

me: haha. Roy in a mustach mihihi
Roy: this is not funny. what do you have against me?
me: nothing really. It's just funny cuz you're useless.
Roy: *BADANG* useless....

well this is what Lin might have ment by:
"if you want to shot the general first shot the horse" I mean it works... but I guess he could have just meant that you need to think about stuff, instead of just rushing of without thinking of the consequenses...
no this is probably what he meant 8D

fma (c) hiromu arakawa