War on the South
The U.S. government has postured as the enemy of ethnic cleansing in its War on Yugloslavia, and also maintained that its assaults on innocents have been purely accidental.
American history complicates the picture enormously.
Thomas DiLorenzo details the history of the U.S. government's attacks on Indians, in his piece, The Feds versus the Indians.
James Bovard shows how Northern generals deliberately targeted the civilian population in their war on the South. Read his Ethnic Cleansing, American-Style.
In a separate piece, Professor DiLorenzo describes the Civil War as the Birth of an Empire.
Charley Reese offers a tribute to Jefferson Davis on his birthday: Here's to One of the Greatest Americans.
The best overall treatment of Lincoln's war is Emancipating Slaves, Enslaving Free Men.