I found this in the hall where I work. I do not know its source, but the sheet had been through several faxes, copiers, etc. If the enemy is in range, so are you.
Incoming fire has the right of way.
Don't look conspicuous, it draws fire. There is always a way. The easy way is always mined. Try to look unimportant, they may be low on ammo. Professionals are predictable, it's the amateurs that are dangerous.