This quest is a family vendetta held by one of the Sentinel High Commanders. To find him and start the quest you'll have to head to the
Sentinel's Tower Research Base
Wailing Wastes - 2700x3500
(2700,3500) in Wailing Wastes. You can get there fairly easily if you use the Wailing Wastes Whom-Pah in Athen.
It can be found in the far North East of that zone, just past the crater lake.
You will find High Commander Frederickson at the top level of the base at the very end in front of a building.
He will tell you that the Sentinels are worried that Omni-Pol will attack their base, but that he is short on reinforcements to help with a counter assault. You will have a chance to offer your help by being leading a party of loyal clanners and assault the base. He will be grateful and then mention Omni-Tek General Kaehler Jr.
It seems that this General murdered Frederickson's sister and he wants nothing short of his head on a silver platter (no, really). If you accept you will be given a mission with a 9 hour limit to deliver the head on the silver platter back to him.
General Kaehler Jr. can be found inside the
Secondary Omni-Tek Base
Avalon - 834x1681
(834,1681) in Avalon, but be warned he is over level 200 and in a very heavily defended base, getting to him is going to be no easy feat and requires at least 2 well organized teams or 1 team of level 210+.
This base, like it's larger counterpart in Avalon is heavily defended, and has invisible control towers at the entrances which will do serious damage to anyone standing too close to any entrances, the southern entrance is the closest to the General so I advise you use that one to pull him outside the base. On that side you will encounter two level 220 omni officers, Sergeant Janet and Sergeant Rocky so be ready for both of them and the guards with them. The guards are well armed with Kyr'Ozch weaponry. On the other entrance there is Sergeant Brad and Sergeant Magenta who are also level 220. Be aware that there is also a Major Hawking inside the base who is level 232.
The first thing is to clear the entrance quickly, work on the officers first. Then quickly kill all the guards. After the entrance is clear, 1 or 2 tanks (players who can sustain heavy damage) must go in and pull the General outside, away from the entrance where the officers and guards were. Guards that are near him when he is pulled are likely to follow as well. Get the General out of the base and away from the entrance to avoid the respawns from the guards and officers you just killed.
The common tactic is for tanks to remain on the General while the rest of the teams take out the guards as the healers keep the tanks alive. Once the guards are down then everyone attacks the General. The reward for taking him down, is his head.
Note: If he was killed he will reappear in 6 hours.
Of course you will need a platter to put the head on. And of course it's not going to be easy to get the second item you need because the only one that has it is Supply Master Eel who is also located inside the Secondary Omni-Tek Base.
You will need to use the same tactics to take him on. He is no pushover and is as hard to kill as the General, but if all goes well the reward will be worth it.
Note: If he was killed he will reappear in 3 hours.