George Meade, a Pennsylvanian who is the commanding the V Corps, Union Army of the Potomac was ordered by President Lincoln to assume command of the entire Army of the Potomac early this morning in Frederick, Maryland. Meade is reported surprised by the change of command order, having previously expressed his lack of interest in the army command. In fact, when an officer from Washington woke him this morning with the order, he assumed he was being arrested for some transgression. He has little knowledge of what Hooker's plans had been or the exact locations of the three Union columns moving throughMaryland to meet the confederate invasion. He has advised Washington he will keep Washington and Baltimore well covered, and if the enemy is checked in his attempt to cross the Susquehanna or if he turns toward Baltimore, to "give him battle."
http://en.wikipedia.org/wiki/Gettysburg_Campaign
