 The Urban Interdiction Group ("Grupo de Interdiccion Urbano") was heavily trained in urban assault techniques.This unit also became part of operations involving the War on Drugs against the Colombian drug cartels like the Medellín Cartel between 1989 and 1994 and the Cali Cartel between 1996 and 1999 with very positive outcomes.The Special Operations Command constantly improves techniques and equipment in order to maintain an advantage over possible criminal actions against civilians and infrastructure.