 Most country towns and rural areas were patrolled by pairs of "Guardia Civil", a military police force for civilians, which functioned as Franco's chief means of social control.Larger cities and capitals were mostly under the jurisdiction of the Policia Armada, or the "grises" ("greys", due to the colour of their uniforms) as they were called.Student revolts at universities in the late 1960s and early 1970s were violently repressed by the heavily armed "Policía Armada" (Armed Police).