If you find yourself unable to proceed in the map because you've been cut off from the main force and are surrounded by the enemy team, you have several options to rejoin the main pack. One is to wait until your teammates have captured a forward graveyard, at which point you can attack the enemy, die, and be revived at that forward graveyard. You can also "ghost walk" to a graveyard on the other side of the enemy then use the spirit healer at that forward graveyard to revive you. Another trick is to ask a Warlock on your team to summon you up to the battle.

Graveyards
Controlling graveyards is very important to your team's success. Control over the graveyards assists your team's advance across the map. Once you've captured a graveyard, your allied players can now spawn there when they die. Eventually, if you capture the graveyards near the enemy town, you can use them as a base of operations to launch your final assault. An additional and very important reason to capture graveyards is for bonus honor at the end of the game.

Capturing Graveyards
Graveyards are defended by NPC guards from the faction that controls them. To capture the graveyard, you have to click on its control flag located nearby. One player should "train" the flag's guards away from the flag while another player right-clicks it to begin the capture process. If you're attacked during this time, the process will be interrupted and you will have to start over again. Once the process is complete, the flag becomes "contested" and both sides are notified.
Once the graveyard has become contested, enemy troops can no longer spawn there. They must now travel from another graveyard further away. At this point, you need some players defend the graveyard until it's converted to your side. This process takes about five minutes. If the enemy comes over and is able to complete the flag re-capture, the graveyard is instantly converted back to their side. They don't have to wait several minutes to get it back; they only have to complete the flag capturing action. If the other side doesn't recapture the flag in time, the graveyard will come under the control of your faction.

A common mistake players make is to leave the graveyard after it has turned to contested. The enemy then just shows up and recaptures the graveyard. Some players need to stay behind and guard the graveyard until it's converted to your side. If there aren't enough players staying, make sure you alert your team.

Defending Graveyards
When you receive an alert message that the graveyard is being taken over, you need to send some team members to save it. Since the graveyard was under your control, all you need to do is go back and click on the flag and complete the channeling time to recapture it. The enemy will try to prevent you from doing this. If you don't have enough people, you might not be able to recapture the graveyard.

If the enemy has not yet contested the graveyard but is trying to, players on your side will continue to respawn at the graveyard for its defense. It's good to cast AoE spells over the graveyard so that anyone trying to steal the flag will be interrupted. Rogues often like to sneak in and try to steal it when no one is looking. If you ever see an enemy standing next to your flag, attack them to stop them from capturing the flag.