REWARDS - Respect
Recruit two Grove boys, then get into a car and head to the yellow blip. You need a group of four people before you can proceed to Unity Station (CJ and Cesar included of course). Meet Cesar's veteranos and they all express a hatred for the Vagos. You will have to go through the neighborhood in order to get to Cesar's house.
Head through and follow Cesar, making sure to kill any and all of the Vagos that come up on your radar. Vagos are always marked with a red arrow over their head, so you won't have a hard time distinguishing them. Once you hear Cesar say that's the last of them, head into the red marker in the alleyway.
More fighting ensues. Continue picking off the Vagos as you continue forward to Cesar's house. Watch out for the Vagos hidden in the garage. One of Cesar's boys heads into the line of fire and gets injured. As you approach him, more Vagos start pouring in from over the walls. Keep firing and making sure Cesar doesn't get killed. A few will come from behind you, so take them out.
After the alleyway is cleared, it's time to get Cesar's house back. Unfortunately, this can be the hardest aspect of the mission since one of the Vagos has a flamethrower and another one on the roof has a rocket launcher! The guy with the launcher should be your first priority, then the flamethrower. Finish the rest of them to finish the mission.
The next mission is the very last mission for the story, so make sure you get all of the weapons and firepower you can muster, as you will need it.
The final mission won't be unlocked until you have taken over at least 35% of the territories in Los Santos.