Star Wars: The Force Awakens Comic Con Trailer Breakdown – 46 Things You Need To See
15. The First Order Attacks...
Perhaps following the shot showing JJ Abrams preparing the troops for deployment, this sequence seems to show the attack by the First Order on a Resistance Base among older ruins on a planet's surface.
Their prey seem also to be wearing red and black, which could be confirmation that the new trooper uniforms captured by the "Colin" monitor in the earlier stages of the footage are indeed affiliated with the Rebellion.
By the look of the scorched terrain, the Empire has got better with their target practice.