George Gordon Meade developed his army career through engineering and surveying before becoming a major Civil War commander. After graduating from West Point in 1835, he briefly resigned, then returned to service in the Corps of Topographical Engineers. Work on coastal surveys and lighthouse construction gave him experience of planning, terrain and technical administration. Service in the Mexican War added combat experience. These professional foundations are easily obscured by later accounts that begin with his unexpected appointment to command at Gettysburg.

Commissioned a brigadier general of volunteers in 1861, Meade led Pennsylvania troops through campaigns of the Army of the Potomac. He was seriously wounded at Glendale in 1862 but returned to duty. At Antietam and Fredericksburg he commanded increasingly large formations; his division's temporary success at Fredericksburg contrasted with the broader Union defeat. Corps command followed, including service at Chancellorsville. His advancement reflected battlefield competence and the disruption of senior leadership as the army's commanders repeatedly changed.

On 28 June 1863 Meade replaced Joseph Hooker as commander of the Army of the Potomac, only days before the Battle of Gettysburg. He coordinated the defence across 1–3 July, relying on corps commanders and the collective resistance of the troops to defeat Robert E. Lee's invasion. Criticism of the subsequent pursuit emphasized the opportunity to destroy Lee's army, but also needs consideration of casualties, exhaustion, weather and uncertain information. Gettysburg was a crucial success, not the product of one individual's decisions alone. Later campaigns at Bristoe and Mine Run showed the continuing difficulty of converting manoeuvre into decisive results.

When Ulysses S. Grant assumed overall command in 1864, Meade retained the army under his close direction. The Overland Campaign and the siege of Petersburg therefore involved an unusual relationship between an army commander and a general-in-chief present with that army. Meade continued managing operations through the pursuit ending at Appomattox in 1865, even as public credit increasingly centred on Grant. Postwar assignments included departmental leadership and military administration in the South during Reconstruction. He died in Philadelphia in 1872. His service extended beyond Gettysburg through command arrangements that often obscured his contribution.