Here`s a plan, gat an engineer upgrade witha grenage buind three trenches and put 2 normal soldiers on the sides of each and put the engineer in the middle of the middle trench and on the other trenches put spec ops troops in the middle of them and upgrade the normal soldiers with M1 Garands and grenades don`t forget to get a medic for each trench and a bazooka when enemy tanks jeeps and cannons come on the battlefield and when you get enough pionts for a tank put it in front of your trenches, it will protect them while lating the shoot over it try to get a tank for each trench.