The Summer and Autumn of 1936 saw the Republican Madrid witness of heavy-hand repression by Communist and Socialist groups , symbolised by the murder of prisoners in '' checas '' and '' sacas '' directed mostly against military personnel and leading politicians linked to the rebels , which , culminated by the horrific Paracuellos massacres in the context of a simultaneous major rebel offensive against the city , were halted by early December . Madrid , besieged from October 1936 , saw a major offensive in its western suburbs in November of that year
Paracuellos massacres
Paracuellos massacres
History of Madrid