Drop troops? Pfft. I had 2 Rhinos, a Destructor, 2 Landspeeders, 2 squads of Marines, a squad of Veterans and a squad of Scouts, as well as 2 bikes and a mounted Chaplain
Ah, but your puny human soldiers need safety in numbers. The might of the Space Marines will crush all who stand before the Emperor!!! Oh yeah, and I forgot about my heavy weapons squad, Predator tanks and Terminator platoon