Complex sentence: Instead, the player sends the ship (s) to a location (using the game's coordinate system) and what happens when the fleet arrives is beyond the player's control; in OGame, combat is resolved when fleets and/or defenses meet.
Split into simpler sentences: Instead, the player sends the ship (s) to a location (using the game's coordinate system) and what to do when the fleet arrives. In OGame, combat is resolved when fleets and/or defenses meet.