The attacking team has to defend their vehicle(s) from the defending team, who can pick up ion disruptors or rocket launchers scattered across the map and use these to stop a vehicle in motion and make it vulnerable to normal blaster damage. While objectives are unique to each map and phase depending on the scenario, the different types of objectives overlap and repeat in Galactic Assault, either in the same way or with some variation. Some vehicles are, however, only available during specific phases. During a match, players can spawn as a hero, Reinforcement, or vehicle using Battle Points earned through gameplay. Every Galactic Assault map is split into multiple phases and features objectives tailored to fit the map's design.
The mode spans all three Star Wars eras, with one faction acting as the attackers and the other the defenders.
Galactic Assault is a large-scale, ground-based, linear game mode in DICE's Star Wars Battlefront II, that pits two teams of 20 against each other in objective-based battles.