Union Generals, Department of the East.
Excerpt from "Politics and Generals" by Brooke C. Stoddard and Daniel P. Murphy, Ph.D.
In today's U.S. Army, rank is determined by experience and expertise, but things were a little different during the Civil War. It was an era in which political favors were often repaid with military appointments, and, as the war began to heat up, President Abraham Lincoln found himself under constant pressure to appoint men with little or no military experience. Many of the Union's early military officers were loyal Republicans, influential War Democrats, or everyday people demanding payback for some earlier favor. As might be expected, the majority of officers so appointed had no right to lead men into battle, and during their relatively brief command they only served to embarrass themselves and their respective War Departments. The First Battle of Manassas resulted in a humiliating Union rout when inexperienced officers panicked and ran in the face of the enemy, abandoning their men.
Source: "Politics and Generals" by Brooke C. Stoddard and Daniel P. Murphy, Ph.D.
Link to the full article: http://www.netplaces.com/american-civil-war/military-leaders-of-the-north-and-south/politics-and-generals.htm
Title: Union Generals, Department of the East.
From top to bottom, left to right, list of the Generals: Wesley Merritt, Alfred H. Terry, John Foster, George Crook, and John Sedgwick.
Entered according of Congress, AD, 1866 by Virtue & Yorston in the clerks office of the United States for the southern district of NYView full details.