As part of General Grant's reorganization of the Army, the 3rd and 5th Michigan Infantry Regiments were moved from General Sickles' 3rd Corps (Diamond or Lozenge) to General Hancock's 2nd Corps (Cloverleaf).

"March 3rd - April 30th (1864) - ... The latter part of this month General U.S. Grant (who had won some successes in the West) was appointed commander of all the Union forces, with the title of Lieutenant General - revived. He soon commenced a reorganization of the Army of the Potomac. ...

"The corps commanders are now as follows: General W.S. Hancock, Commanding 2nd Corps, consolidated with a portion of the 3rd...

"It was a heavy blow to veterans of the old 3rd Corps to sink their identity in another body, but they made a gain in one or two respects. Under General French, the corps had a more than even chance of losing whatever reputation it has, while under Hancock there isn't any such contingency. And while the 2nd Corps might absorb most of the future honors, nobody would confound the doings of Birney's division with any but the old 3rd Corps. We have our generals and our distinctive corps badges. One other thing: there are no troops in the Army of the Potomac who wouldn't feel proud to fight under Hancock, Warren, or Sedgwick."

Excerpt from, The Rebel Yell & the Yankee Hurrah