How many tanks broke down in the battle of somme?

During the Battle of the Somme in 1916, approximately 1,500 tanks were deployed by the British forces, but around 400 of them broke down or became inoperable due to mechanical failures, battlefield conditions, and the challenges posed by the terrain. The introduction of tanks marked a significant moment in warfare, although their effectiveness was limited by these issues. The battle itself was one of the largest and bloodiest of World War I, leading to heavy casualties on both sides.