A very VERY effective way of clearing enemy forces is by creating a Kamikaze Car. When you spawn, become an engineer, then using the Axis' jeeps, put all of your dynamite in the back seat of the jeep, (it will stay there while your driving, unless the car flips or you go up on down a steep incline) and drive it straight into the midst of the enemy forces. They will shoot the car and it will blow up with the added power of 4 or more sticks of dynamite, sometimes killing over 10 people.

Note: DO NOT use mines, once you start driving, they will blow up.
This only works properly will the Axis' jeeps, because they have large back seats and doors on them, if choose to Kamikaze in an Allied jeep the dynamite usually gets thrown out the doors.