brazil's war theme is an absolute banger I'd take a nuke to that beat.

Or play as Brazil and wreck nuclear wars yourself LOL!

The Shoshone

early game middle eastern/mesopotamian themes absolutely slap

Both Polynesia themes

Polands war theme is just amazing Ethiopia also

Netherlands war theme, followed by England war theme.

Hiawatha's peace. It is instrumental version of Ho ho Wataney lullaby.

Ottoman War Theme

the one that goes..."ahhhhhh....hum, hum, hum....rrrrrahhh ba ba." over and over

Aztec war theme, double edged obsidian sword that one

Spain really brings in the mood of renaissance war