Domination was the main player-vs-player game TG played with the original Ghost Recon. The way it worked was like this:

There are five zones in the map. A team must "capture" a zone by standing in it and thus turning the zone their color. They get one point per zone per second. So the more zones you have the faster you accumulate points. So the point of the game is basically to capture more zones then your opponent for a longer period of time.

When TG played it, we still played with no respawns, which means the game could end by the death of all members of one team or when time ran out. So initially there was usually a scramble for zones and position. Whichever team ended up on top then got to fortify its positions, while the other team had to maneuver and find a way to capture a new zone. Often, towards the end, there would be 1 player vs. a few on the other team, and because they couldn't cover all the approaches or all the zones, that one player would have to run around frantically trying to sneak up and flank the enemy, while the other team was frantically trying to track the player down before he captured any more of their zones. Some of the funnest times I had were when I was the last one left, and I got to sneak around capturing zones, trying to convince the other team I was headed in one direction when I was actually doubling back or going down a side-route.

Consider it similar to your standard capture-the-zone gametype that most games come with. But the addition of no respawns changes the nature of it quite a bit. It's no longer a game of aggregate kill-to-death percentages and sprint-to-zone strategies. A single push in the right spot at the right moment, sometimes just minutes before the end of the round, can change everything.