177, 156, 172, 167
If the whole team (best with 4 or more people) constantly attacks the enemy without any breaks, there will be no need for defending because you are keeping them on thier own turf, and they won't be able to organize an effective resistence, all that they can do is spawn and die, spawn and die, spawn and die, and eventually you will get your prize of the flag. This should not be used in the middle of a game while the enmy and your own forces are al over the map, you should do this with great caution or the enemy can take your flag while you are all attacking their base.
The point of this is to create much chaos for the enmy (working, kind of, in the same way as attacking the enemy relentlessly). They will spawn, die, spawn, die, or they will not be able to see everything thats going on with pillars of dirt flying 15 feet in the air. This will give you the chance to slip in the enemy base unharmed in the mix of chaos, or in KOTH, it will eliminate all the enemies leaving the hill open to take while you have been attacking while behind protection and from a safe distance leaving you unharmed.
This is most effective with at least 3 people (each should all have their own vehicle, no doubling up). The point is not to attack with vehicals and guns blazing, but to all at once just come at them with too many targets (that are fast )to shoot at, you want to encircle the base as soon as you get there and do so a few times while sombody gets inside (could have been hiding in wait till the attack commenses or in one of the vehicles), and takes the flag, when in the mean time the enemy is pre-occupied eliminating all the swarming targets. Then the remaining vehicles should try to pick up the flag carrier if they don't already have a ride, and when the carrier is returing to base sombody should follow him for protection.
Get a good spot either out of sight, in the shadows, or up high, and these spots should have a good command of the battlefield (be able to see most of the map). From the spots that are up high you can see a lot of the map, and firing should be continuous (if u can see the enemy base and nobody is attacking fire at the enemy base in the meantime), and if you don't hit the enmy on the way in to your base, you'l be shure to kill them on the way back out. If you are hiding in the shadows than you should take your time (don't take too long - to be safe give yourself enough time to fire twice before they can get inside your base). If you are out of sight (like right behind a hill), because you are in a vehical you should be able to look over the hill, while on the other hand your approaching opponents cannot spot you, (this particular tactic is basically a trap). Wait for them to come as you can see them approaching your position, and when they are close enough to hit with one shot and not miss pop out, make the kill, go back and wait till the next kill comes in. (WARNING: watch out for rockets and you should have considerable amount of time to dodge them)
There are 2 major ways to cripple the enemy. First and most importantly, is to block the teliporters (good tactic in KOTH aslo), this is extreamy important, and can bring the battlefield to your favor, sometimes you may want to block the teliporter coming out of your base but that depends on the situation at hand. Blocking the enamy teliporter is important, if you are too much on the defensive because they continuosly keep coming through that teliporter, you must block it and put and end so that your forces can move out and attack, this is also very crucial if you have a foothold just near the enemy base and are continuosly hammering them, because if they do move through their teliporter they can break your lines and you will be forced to fallback, rendering the attack useless. The second way to cripple the enemy is by simply taking their vehicles, if they are getting you guys in a lot of trouble due to their tanks for instance, take them out then bring them to your base.
A tank has many uses, this is one of them. Get a spot where you can the enemy base with your tank, then open fire and keep shooting continuosly unless you are being attacked. This will demoralize them as well as giving your men that are attacking cover fire, and destracting the enemy.