Endless reinforcements

This game was extremely curious, the enemy did not seem to run out of reinforcements.
We win for time, because the enemy kept coming, we killed them and the reinforcements down extremely slowly.

The game was very good, extremely close, but this curious event left me stunned xD

I don’t remember seeing that you could regenerate points in the game. Does anyone know anything? haha

I know that you can’t shoot anti aircraft balloons for bonus reinforcement tickets.
But as far as I know, they’re not in Tunisia.