Magdiwang

Defense:

Ah, yes, generally the most boring part for most people, for often the enemy will never come. However, when they do, a poorly organized and unaware force is easily overtaken and a valuable objective is lost.
When setting up a defensive position keep several things in mind:

1. Your first line should never be your last line.
When defending an area, there are generally several areas in which to take cover. Maybe some trees up front, with foxholes further in, or whatever the case is. Now it may be tempting to start your defense at the fox holes, but this is a poor idea. Start behind the trees. They do not offer as much cover but if you have to, you can fall back to the fox holes. Starting out at the fox holes or other central defense means the OpFor has a smaller area to gain control of.

2. 360 Coverage.
Pretty much obvious. I feel no example is needed. An open flank is a front waiting to be opened. Ensure you have guns keeping watch all around, no matter how dull things are getting.

3.Defensive Ambushes
When engaged in a siege, the assaulting team is rarely aware of their rear flank. A small unit in concealment on the exterior of your perimeter can be helpful. A quick reaction force that can flank an enemy when they begin the assault. Pinning them from the front and rear, breaking offensive capability.

4. Know when to fire
If your prone behind a tree watching an area, do not fire the moment an enemy is spotted, instead, wait for him and others to draw closer so a burst can take out several attackers.

5. Use of SAWs.
SAWs are excellent for both defense and offense. In defense, never cluster
them. Try and put one at each cardinal direction. If you don't have that many, keep them ready to redeploy to wherever an assault is. But never cluster them so in the event a position is over run, not all your ROF is lost.

6. Hold at all costs.
Never give up. If you're the last man, make the place as hard to take as possible. Making it seem like there are others. The objective isn't lost until your whole team is dead.

Offense

Advance, advance, advance.cheers

Oftentimes an offense is a cluster of people spraying a location from far away. These become long and drawn out, with no clear victor in the end, unless the assaulting team moves to take some ground.

The 3-5 second rush. A military tactic that involves rushing from one point of cover to another in a time so short the enemy cannot draw a bead on you. Highly effective for advancing.

2. Using the enemies cover
Using the defense positions the enemy neglected to use.

3. Flanks
New players and even the salty guys tend to ignore one of their flanks from time to time. An unguarded flank is the worst enemy to any defense. Even one player can use an unguarded flank to deadly effect. So find a flank, and keep the enemy thinking your assault is coming from elsewhere.

4. Assault Formation
When assaulting, try to do so in a line. It covers a larger area, and is effective for advancing forward.