When tanks were first used during this 4 month battle?

Tanks were first used in significant numbers during the Battle of the Somme, which took place from July to November 1916 during World War I. The British deployed tanks for the first time on September 15, 1916, in an effort to break through German defenses. Although the initial impact was limited due to mechanical failures and battlefield conditions, the introduction of tanks marked a pivotal shift in warfare tactics. This battle highlighted the potential of armored vehicles in overcoming trench warfare stagnation.