Which turning point do you think had the greatest impact on the great war

The First Battle of the Marne (also known as the Miracle of the Marne) was a World War I battle fought from September 5 to September 12, 1914. It was a Franco-British victory against the German army under German Chief of Staff Helmuth von Moltke the Younger.

The battle of the Marne was a major turning point of World War I. By the end of August 1914, the whole Allied army on the Western Front had been forced into a general retreat back towards Paris. Meanwhile the two main German armies continued through France. It seemed that Paris would be taken as both the French and the British fell back towards the Marne River.

In 1942, Hitler sent an army south in an attempt to capture the Soviet Russian city that had been renamed after the Soviet leader Josef Stalin. Thus, on July 7, started the largest, deadliest, most destructive battle ever fought in the history of warfare.

Generally argued to be the most significant turning point of the war, the Battle of Stalingrad was one of the Wehrmacht's most ambitious operations, in which they committed, and lost, over 400,000 soldiers.

The great strategic turning points in World War 2 , here is my list, explained :

it increased the power of the king of england.