The Union troops did not know what the gun was.

A company of Union troops was called in and drove them off.

The town was burned by Union troops in late 1861.

Almost all of the town was burned by Union troops in 1862.

A second example is the manual used for training of Union troops in 1861.

The children were saved by the staff and Union troops in the city.

However, the Union troops had crossed north of the site.

Union troops set up their camps on the side of the road.

Union troops returned just six weeks later and stayed through the end of the war.

Union troops not only found refuge in the house, but left their physical mark there as well.