Call of Duty: World at War

[Dimnos]

So... In CoD 4 campaign, the enemy had a limited number of guys right? I recall being able to camp a spot and keep killing enemy soldiers and eventually they would just stop coming and would all be dead. Im not sure that is how it works in this one. I am stuck on the 2nd to last mission where you are storming the outside of the Reichstag and you have to destroy the 4 cannons. I have been able to take out the first two but I cant even get back to the last two. I decided to just stay back and snipe then off but I think they just keep spawning in the back and coming to the front. Can anyone confirm that the enemy does or does not have a fixed number of troops?