The important things are always simple. The simple things are always hard. The easy way is always mined. If you are short of everything except enemy, you are in combat. When you have secured an area, don't forget to tell the enemy.
Incoming fire has the right of way.
Beer math is 2 beers times 37 men equals 49 cases. Body-count math is 3 guerillas plus 1 probable plus 2 pigs equals 37 enemy killed in action. Friendly fire - isn't. Things that must be together to work usually can't be shipped together. Radios will fail as soon as you need fire support desperately.