The Scots-Irish in "Both My Sons" by Ken Yoder Reed

The Scots-Irish are mad. They have been settling on a land corridor around the German settlements of SE Pennsylvania.
The Quakers who run the Pennsylvania Assembly, with the support of the German settlers, hold to a policy of pacifism and refusal to raise militia or build forts to defend the province.
With leadership by ‘Fighting Parson’ John Elder, the Scots-Irish take things in their own hands. Elder forms the Paxton Boys, who follow Braddock into battle. In Both My Sons, Greenywalt’s son Ichabod is a leader in this militia.
Pix—Lithograph of Paxton Boys’ massacre of Native Americans at Lancaster, PA in 1763 (Wikipedia)