This, combined with the ensuing ground invasion, killed nearly every human in the facility, including their father and sister.

I believe these reasons alone are enough to rule out the option of a ground invasion.

The story shows them eventually leading to a ground invasion and a military draft in the United States.

This pace would continue for the next four weeks, until a ground invasion was launched on February 24.

There are no plans for a ground invasion, but "a small number of special forces" may be needed on the ground, too.

Looks like we got a Chinese ground invasion under way, supported by some air cover.

Colonies can be bombed out from space, or taken in ground invasions.

Russian newspapers have reported this week that preparations are under way for a ground invasion.

Anything short of ground invasion, in other words.

Likewise, the colonists should all be trained to handle a ground invasion.