|This article does not cite any sources. (December 2009) (Learn how and when to remove this template message)|
During World War II, Operation Keystone was a Special Air Service patrol consisting of a number of jeep-mounted and airborne teams that operated south of IJsselmeer in the central Netherlands in early April, 1945.
By the middle of the month, the team had joined up with the Archway team.
|This World War II article is a stub. You can help Wikipedia by expanding it.|