Make it too tough for the enemy to get in, and you won't be able to get out. Tracers work both ways. Military Intelligence is a contradiction. Weather ain't neutral. The Cavalry doesn't always come to the rescue.
Mines are equal opportunity weapons.
Killing for peace is like screwing for virginity. The one item you need is always in short supply. When in doubt, empty your magazine. The side with the simplest uniforms wins. Never stand when you can sit, never sit when you can lie down, never stay awake when you can sleep.