Having set forth into Maryland in pursuit of General Robert E. Lee we headed North-West as part of the great Union Army, a mighty force of 80,000 or more men that surely would finally end this break in the Union, and restore the country. After two weeks rapid marching through the hills and mountains we came upon the main rebel army, and as our forces converged I was tasked with holding a vital section of river, to ensure the enemy could not use it as a route to slip out of our trap!
During our march rebel cavaliers had been harrying some of our supply columns, cutting or intercepting our telegraph lines, and generally making a nuisance of themselves. As a result as my small Division deployed to its allotted flank guard position I was conscious of the possible presence of enemy raiders in my rear – having no cavalry in my command I had no means either to effectively monitor for their presence.