Steel is an alloy of iron and other elements, primarily carbon, that is widely used in construction and other applications because of its high tensile strength and low cost.
The turning point of the Pacific Campaign of World War II was the naval Battle of Midway, which occurred between June 4 and June 7, 1942.
Those battles were the turning point for the Allied Forces. They had finally defeated the Japanese in battle. They also discovered they could out smart the Japanese by deciphering their messages. The Allied Forces' morale grew and they knew then they could win the war.