Posted by my pal Sir_Tainly elsewhere. I found it comical anyway.
1) If the enemy is in range, so are you. 2) Incoming fire has the right of way. 3) Don't look conspicuous: it draws fire. 4) The easy way is always mined. 5) Try to look unimportant, they may be low on ammo. 6) Professionals are predictable, it's the amateurs that are dangerous. 7) The enemy invariably attacks on one of two occasions: When you're ready for them. When you're not ready for them. 8) Teamwork is essential; it gives the enemy someone else to shoot at. 9) If you can't remember, the claymore is pointed at you. 10) If your attack is going well, you have walked into an ambush. 11) Don't draw fire, it irritates the people around you. 12) The only thing more accurate than incoming enemy fire is incoming friendly fire. 13) When the pin is pulled, Mr. Grenade is not our friend. 14) If it's stupid but works, it isn't stupid. 15) When in doubt empty the magazine. 16) Never share a fox hole with anyone braver than you. 17) Anything you do can get you shot. Including doing nothing. 18) Make it too tough for the enemy to get in and you can't get out. 19) Mines are equal opportunity weapons. 20) A Purple Heart just proves that were you smart enough to think of a plan, stupid enough to try it, and lucky enough to survive. 21) Don't ever be the first, don't ever be the last and don't ever volunteer to do anything. 22) The quartermaster has only two sizes: too large and too small. 23) Five second fuses only last three seconds. 24) Friendly Fire isn't 25) Your weapon was made by the lowest bidder. 26) You are not supermen. (Freshly graduated recruits from Marine boot camp and all fighter pilots, especially, take note.) 27) No plan survives the first contact intact. 28) If you are forward of your position, the artillery will fall short. 29) The enemy diversion you are ignoring is the main attack. 30) The important things are always simple. 31) The simple things are always hard. 32) If you are short of everything except enemy, you are in combat. 33) When you have secured an area, don't forget to tell the enemy. 34) No combat-ready unit has ever passed inspection. 35) Beer math is 2 beers times 37 men equals 49 cases. 36) Suppressive fire – won't. 37) Body-count math is 3 guerrillas plus 1 probable plus 2 pigs equals 37 enemy killed in action. 38) Things that must be together to work usually can't be shipped together. 39) Radios will fail as soon as you need fire support desperately. 40) Tracers work BOTH ways. 41) If you take more than your fair share of objectives, you will have more than your fair share to take. 42) When both sides are convinced they are about to lose, they're both right. 43) When in doubt, empty your magazine.