The handbill says it all: http://www.kansasmemory.org/item/313971
One of the less attractive home front activities was the assault on those who stood against the war, or were basically considered disloyal Americans. This was particularly noticeable in the German communities, as well as the Mennonite communities of central Kansas.
German spies . . . German sympathizers . . .Dirty Slackers. If you were considered by your neighbors as one of these, you could be a target.
The above handbill was distributed in Barton County in mid-April 1918. Late at night the handbills were distributed to every home in Great Bend. A plane dropped handbills on Hoisington, Larned and Redwing. Men on horseback firing pistols in the air was the method of delivery in Ellinwood.
In June two Mennonite leaders were tarred and feathered in McPherson for speaking out against the war.
And of course, no one knew who the Night Riders were.