Operation Vigilant Sentinel happened on 1995-12-01.
Sentinel Returns happened in 1998.
The Sentinel - video game - happened in 1986.
Operation Sabotage happened in 1982.
Operation Gericht happened in 1916.
Operation Tombola happened in 1945.
Operation Atalanta happened in 2008.
Operation Delphin happened in 1943.
Operation Huckaback happened in 1943.
Operation Wikinger happened in 1940.
Operation Amherst happened in 1945.
Amoy Operation happened in 1938.
Operation Anadyr happened in 1962.