"Gen. Granger is very rough on this march. He whipped an infantry man with a rope & was going to do so to Corp. Cogswell of No. I; but Cogswell tried to get hold of the Gen to choke him & it finally ended. Sheridan choked a lieut. of Bat A 1st Ill. at Chickamauga creek, & came very near being shot for it..."
Letter of George E. Dolton to his wife. Published in The Path of Patriotism, page 105.
Can't find it now, but there's an account of Union Gen. John Geary berating the men and a couple of them responding by beating him up, dashing into the crowd before he could retaliate. Of course, no one saw what happened.