Survival is a Time/Score game-mode in Toy Soldiers and Toy Soldiers: Cold War that pits you against endless waves of enemies that get even harder by the minute.
The key to survival is to not panic or worry that you need to defend your base. The best thing to really do is place traps infront of the toy box. It will slow down soldiers and begin to make the tanks slower for even a few seconds. But it will be enough time to eliminate the most German forces trying to enter the box.