advance guard

On the evening of September 17th he sent away his advance guard of two thousand men in eighty small boats.

Thereafter he commanded the advance guard of Victor's army which invaded the Papal States.

This exclamation was caused by Lawrence and the advance guard charging down upon them.

Crawling down from the street above, on one side only, and clinging to the upper houses, was the advance guard of the fog.

The horror and amazement of the advance guard of Turner's force may be imagined when they came upon the scene of conflict.