The term Sentinel can refer to a person or thing that watches or stands as if watching, or, more notably in this case a soldier stationed as a guard to challenge all comers and prevent a surprise attack. Basically, its a guard who stands watch to prevent a surprise attack.
The Sentinels was created in 1971.
Sentinels novels was created in 2006.
The Three Sentinels was created in 1972.
Silent Sentinels happened in 1917.
Sentinels of Silence was created in 1971.
Mexicali Sentinels was created in 2006.
The duration of Space Sentinels is 1320.0 seconds.
The duration of Sentinels of Silence is 1080.0 seconds.
Space Sentinels was created on 1977-09-10.
Night of the Sentinels was created on 1992-10-31.
There are 13 female sentinels present in the original matrix trilogy.
Sentinels in the Air - 1956 is rated/received certificates of: USA:Approved