Operation Sentinel may refer to a number of different military operations:
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2001–02 India–Pakistan standoff
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Opération Sentinelle
Opération Sentinelle is a French military operation with 10,000 soldiers and 4,700 police and gendarmes deployed since the aftermath of the January 2015 Île-de-France attacks, with the objective of protecting the deemed sensitive "points" of th ...
, the placing of military guards in major French cities after the 2015 terror attacks
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