thumb|upright|Coat of arms of the GREIMs The Mountain Rescue and Intervention Groups (, GREIM) are the special units of the Spanish Civil Guard focused on mountain and cave rescue, and, in general, all the police work in mountain conditions.
thumb|upright|Coat of arms of the GREIMs The Mountain Rescue and Intervention Groups (, GREIM) are the special units of the Spanish Civil Guard focused on mountain and cave rescue, and, in general, all the police work in mountain conditions.
==History== ===The Skiing-Climbing Groups=== After the Spanish Civil War, under the Law of 15 March 1940, the Carabineros Corps charged with protecting the borders against smuggling became part of the Civil Guard. Border Commands were set up, responsible for sealing the Pyrenees and the Spanish-Portuguese border. During the first years of their existence, the Commands were faced with incursions by Maquis who infiltrated with subversive propaganda and material for use in acts of sabotage inside Spanish territory.
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