"I believe they were sent out here as an advance unit, setting up air defense and surveillance operations in southern Macedonia."

Their advance units will be here by the end of the day.

As the advance unit enters a back room, Ishai suddenly spots a figure moving in the dark.

Similar distractions also occurred with our advance units based at ar-2 and ar-3.

An advance unit drove toward the protesters several times today and then turned back.

It seems they've sold a record number of advance units.

The advance units were only a few miles ahead now; he'd catch up with them in the morning.

Gregory and I will ride ahead to make sure they don't have an advance unit up on the trail.

The head is the elite fighting force, the advance unit.

Point was first man, ahead of the advance unit.