It truly is. This applies outside of battle as well-- without the merchants transporting goods and the farmers growing the grain or raising the livestock, there is nothing left to build either an army or a nation upon.

[He looked up at the man, an amused grin on his face.]

You are wiser than you seem, and in a great many ways than what someone would expect. Moments like this have you sounding like a teacher... but you've certainly seen a great many more battles than most people, haven't you?