In Major-General Sir Archibald Campbell, the viewer sees a dignified portrait of the military leader. The painting features rich colors, predominantly deep blues and warm browns, which convey a sense of authority. Sir Archibald Campbell is depicted in a formal military uniform, adorned with medals that signify his rank and achievements.

The background is subtly muted, allowing the figure to stand out prominently. The painting is executed in oil on canvas, a common medium for portraiture during the Romantic period. Romney's technique showcases a smooth application of paint, creating a lifelike texture in the skin and fabric. The dimensions are approximately 76 x 63 cm, making it a sizable work that commands attention.

The careful detailing of Campbell's uniform and facial features reflects Romney's skill in capturing likenesses. George Romney was a prominent British portrait painter of the 18th century, known for his ability to convey character through his subjects. This portrait of Major-General Sir Archibald Campbell was created during a time when Campbell was recognized for his military contributions. An interesting fact about this work is that it exemplifies Romney's shift towards a more expressive style, moving away from the more rigid forms of earlier portraiture.

The painting remains a significant representation of British military history.