Spanish Civil War
Battle of Jarama
Arganda del Rey, Madrid, Spain
The consolidation of various militias into the Republican Army had started in December 1936. The main Nationalist advance to cross the Jarama and cut the supply to Madrid by the Valencia road, termed the Battle of Jarama, led to heavy casualties (6,000–20,000) on both sides. The operation's main objective was not met, though Nationalists gained a modest amount of territory.