Mission 4: Gatecrushers - p. 2 MoW: Vietnam Guide
Last update: 11 May 2016
New objective: Repel enemy attacks from the south.
Even before you get this objective, you should have already placed the transporter in the right spot - in [11], and in such a way that you're able to see the place where the river can be crossed [12]. That's what a small squad of enemy soldiers will attempt to do. Wait until they all come out of hiding and open fire. Try to kill as many enemies as you can with the round and you have and keep shooting until you fire the entire clip. However, after reloading don't start shooting at those who escaped the first round...
...but wait for the APC that will also attempt to cross the river in [12]. An accurate round should do enough damage to immobilize the vehicle so that it shouldn't manage to get to the radio center (previous squad of soldiers were also trying to get there). Next, simply kill all the soldiers, as well as those who will get out of the APC. You will complete the mission objective, but it doesn't mean that it's the end of the battle.
The Americans will be pushing from the west once more. That's why you must send your APC to [3] again and hide it from the enemy tanks. When you get there, start shooting at the enemy infantry. Also, don't let the enemy APC enter your base. Well, your allies could have already destroyed it in [6] But, if it's still there, prepare your APC to destroy the enemy vehicle. In order to do that you don't need to hide your APC behind the hill, just place it near the gate. But when you notice some enemy tanks, hide your transporter immediately.
Now, it's also the time to use air support. Look at the battlefields in [6] and [9] to find out where the enemy tanks that are still operational are located. Make sure you are targeting only those very tanks, not any empty tanks or wrecks.
Again, if a tank approaches [7], use the APC hidden in [3] to fire at the side of the enemy vehicle. This should immobilize it. At this point, you can even afford to lose the transporter, as it is more important to dispose of all enemy tanks. Remember that you still have one operational tank, which should remain intact in [2]. Of course, try to eliminate as much hostile infantry as you can and don't worry about those who are currently fighting in the area of [13].
Only when there are no enemy tanks on this flank, and the enemy infantry begins to withdraw, can you send your tank to [13] to deal with the rest of the enemy tanks and infantry. Naturally, if your allies had already done it, sending your tank won't be necessary. Anyway, this is the end of the battle, so if you had managed to destroy all the tanks, you can breathe a sigh of relief. If you still have at least one functional vehicle, the elimination of the enemy infantry will not be a problem.