Pepperrell Air Force Base, previously known as Fort Pepperrell, was a former United States military base located in St. John's, which operated from 1941-1960.
Fort Pepperrell expanded significantly after the United States entered the war with the attack on Pearl Harbor in December 1941.
Fort Pepperrell was designed to accommodate 3,500 personnel with indoor storage for 310 vehicles, 146,315 square feet (13,593 m2) of covered warehouse space, and outdoor storage of approximately twenty acres for vehicles, lumber, equipment, and supplies.
Peacetime left the future of the Newfoundland Base Command and Fort Pepperrell unclear, since the deactivation of units and redeployment of forces had been going on at a rapid pace.
On May 15, 1960 the last American forces departed Pepperrell AFB when the United States Army Transportation Terminal Command Arctic closed its headquarters.
On August 10, 1960 the American flag was lowered at Pepperrell AFB and the Union Jack and the Canadian Red Ensign were raised as the base property was transferred back to the Crown.
The Government of Canada kept a small portion of the base for use as what is now CFS St. John's.
The remainder was transferred to the Government of Newfoundland, which subsequently sold off and developed the remainder of the property.