John Rutter Brooke (July 21, 1838 – September 5, 1926) was one of the last surviving generals of the American Civil War when he died aged 88.

Rushed into action as reinforcements by Maj. Gen. Winfield Hancock, Colonel Brooke launched a limited counterattack against oncoming Confederate forces with his brigade in the Wheatfield.

Although he was knocked out of action with a severe wound, his men temporarily stopped the Confederates and stabilized the Union line long enough to prevent a breakthrough.

In Puerto Rico, he landed in Arroyo with General Hains, and reached Guayama by the time the armistice was signed.

General Brooke was a member of the Military Order of the Loyal Legion of the United States (Companion #02434) and served as its national commander-in-chief from 1905 to 1907.

The former U.S. Army military post in San Juan, P.R., which encompassed El Morro Castle was named Fort Brooke in his honor.