When Lincoln was President he told this story of the Black Hawk War:
The only time he ever saw blood in this campaign, was one morning when,
marching up a little valley that makes into the Rock River bottom, to
reinforce a squad of outposts that were thought to be in danger, they
came upon the tent occupied by the other party just at sunrise. The men
had neglected to place any guard at night, and had been slaughtered in
their sleep.
As the reinforcing party came up the slope on which the camp had been
made, Lincoln saw them all lying with their heads towards the rising
sun, and the round red spot that marked where they had been scalped
gleamed more redly yet in the ruddy light of the sun. This scene years
afterwards he recalled with a shudder.