Remnants of an Army is an oil painting completed in 1879 by Elizabeth Thompson (later known as Lady Butler). The work depicts the arrival of Assistant Surgeon William Brydon at the gates of Jalalabad, the sole recognized survivor of the 16,500-strong British-Indian force that retreated from Kabul during the First Anglo-Afghan War in January 1842. It is one of the military subjects that made Thompson famous after the success of The Roll Call in 1874. The composition centers on a lone, exhausted rider slumped atop a weary horse, set against a barren landscape under a pale sky.

The figure of Brydon is shown in tattered uniform, his gaze turned upward, while the distant fortress of Jalalabad and its defenders are visible to the left. The muted palette of browns, ochres, and greys, along with careful attention to the textures of the ground and sky, heightens the sense of desolation and endurance. The painting’s naturalistic style and somber tone reinforce the gravity of the historical event it represents. Remnants of an Army was exhibited at the Royal Academy in 1879 and was met with significant public and critical attention for its depiction of British military history.

The painting is held in the collection of the Tate Gallery, London. It remains one of Elizabeth Thompson's most recognized works, noted for its historical accuracy and emotional restraint.