Are you sick and tired of being back capped, flanked and un-able to reinforce as quickly as the enemy. Well there's one quick and easy solution destroying squad tunnels.

You would be amazed how effective it can be when the enemy has to run back from their home spawn, just like you do assuming your SL is dead.. which he probably is.

First step, be aware of their existence.
Too often I see my team continuing to run forward leaving caps scarcely defended despite the fact that there are squad tunnels nearby. "But how do I know where they are?" you may ask yourself, it's easy. If the enemy keeps coming from a certain direction regularly chances are theres a squad tunnel over there. You can also check your map (which you should already be doing often) because squad tunnels will be revealed on the map whenever friendly infantry is close enough or if the loach helicopter (the little bird) successfully scouts them.

Second step, Operation Charlie-be-gone
Once you know where the squad tunnel is, it's time to blow it up. I wouldn't suggest doing this alone as it seems there isn't a way to prevent the enemy from spawning on top of you untill it's actually destroyed. I find the easiest way to destroy them is hitting them any kind of explosives (usually a grenade) destroying it instantly. You can also use a flamethrower or the commander can call in a napalm strike in the area. If not you'll have to get close and hold the use button there should be a display on the screen so you'll know if you're doing it right, it takes about 8-10 seconds to complete so make sure someone is covering you.

Third step, Take the rice fields
Now that you have been enlightened, it's time to show Charlie what true freedom is.