23rd New Jersey Volunteer Infantry AKA

The 23rd New Jersey Volunteer Infantry was an American Civil War infantry regiment from New Jersey that served a nine-month enlistment in the Union Army.
They were sent out to join the Army of the Potomac, it was brigaded with the New Jersey units that made up the famed "First New Jersey Brigade".
 The arrival of the nearly 1,000-strong 23rd New Jersey and the newly recruited three-year 15th New Jersey Volunteer Infantry greatly replenished the brigade's numbers.
When the 23rd New Jersey's first commander, Colonel John S. Cox, resigned to prevent a court-martial for drunkenness in November 1862, the new commander, Col. Henry O. Ryerson (the former Lieutenant Colonel of the 2nd New Jersey Volunteer Infantry), reviewed the regiment, and disparagingly called them "Yahoos", due to their less than military demeanor and irreverence. The men of the regiment took to the sobriquet, emblazoning it on their regimental flag, and called themselves Yahoos for the rest of their lives.