Battle of Gettysburg, First Day

The First Day of the Battle of Gettysburg during the American Civil War took place on July 1, 1863, and began as an engagement between isolated units of the Army of Northern Virginia under Confederate General Robert E. Lee and the Army of the Potomac under Union Maj. Gen. George G. Meade. It soon escalated into a major battle which culminated in the outnumbered and defeated Union forces retreating to the high ground south of Gettysburg, Pennsylvania.

• http://en.wikipedia.org/wiki/Battle of Gettysburg, First Day
• Page 208, 219 - Sears, S. W., 2003, Gettysburg: First Mariner Books, New York, 623p.