What were he four major battles of world war 1?

The four major battles of World War I include the Battle of the Marne (1914), which marked the end of the German advance into France; the Battle of Verdun (1916), known for its immense casualties and symbolic significance for France; the Battle of the Somme (1916), notable for the introduction of tanks and one of the bloodiest battles in history; and the Battle of Gallipoli (1915-1916), a failed Allied campaign aimed at securing a sea route to Russia. Each battle significantly influenced the course of the war and had lasting impacts on military strategy and national morale.