The outbreak of revolution in America and anticipation of a similar event in France, caused a degree of conflict in the minds of Protestant settlers in the area. As subjects of the English Crown, they were bound to aid the Crown in repulsing any attempt at invasion. In their hearts, however, many sympathised with the ideals of independence. In response to a call from England for volunteers, each county established a corps of men to repulse attack. By 1779, there were 45000 volunteers, including freeholders from this district.

The Acheson family never championed the cause and there was no volunteer company in Markethill, but from other parts of the district men answered the call of their monarch and used their loyal service as a means of demanding parliamentary equality between the Irish and Westminster Parliaments. In no position to offer resistance, Westminster granted the request and the Irish Parliament received a measure of independence in 1782, allowing elected officials such as the Acheson family to accomplish more for their constituents. Soon after, the volunteers were disbanded.

A gentleman's outfit from 1790 in Armagh County Museum.