Written By: Ben Cosgrove

No conflict in recorded history transformed the globe as thoroughly as World War II. Cities were obliterated; national borders were altered; revolutionary and, in some cases, fearsome military, medical, communication and transportation technology were invented; and tens of millions were killed the majority of them civilians. Simply put, the world of August 1945, when the war ended, bore little resemblance to that of September 1939, when Nazi Germany invaded Poland.

During those six long, uncertain years, LIFE covered the war with more tenacity and focus than any other magazine on earth. Twenty-one LIFE photographers logged 13,000 days outside the U.S.; half of that time was spent in combat zones. In tribute to those journalists, and to the men, women and even children who sacrificed so much in the Allied war effort, LIFE.com combed the magazine’s unparalleled archives for some of the greatest pictures made during WWII often searing, occasionally lighthearted, always memorable images from the streets of Blitz-ravaged London to the sands and jungles of Saipan, Guadalcanal and Iwo Jima.

Seven decades have passed since the war ended, but the power of these pictures (several of which were never published in LIFE) has barely faded: confronting them today, we’re still dumbstruck by the destruction; we still flinch at the scale of the suffering; and we marvel at the courage of the men and women whose unity of purpose kept the flame of hope alive in the darkest hours.

World War II: Photos We Remember

World War II: Photos We Remember

W. Eugene Smith—Time & Life Pictures/Getty Images

World War II: Photos We Remember

World War II: Photos We Remember

Alfred Eisenstaedt—Time & Life Pictures/Getty Images

World War II: Photos We Remember

World War II: Photos We Remember

William Vandivert—Time & Life Pictures/Getty Images

World War II: Photos We Remember

World War II: Photos We Remember

George Strock—Time & Life Pictures/Getty Images

World War II: Photos We Remember

World War II: Photos We Remember

Andreas Feininger—Time & Life Pictures/Getty Images

World War II: Photos We Remember

World War II: Photos We Remember

Marie Hansen—Time & Life Pictures/Getty Images

World War II: Photos We Remember

World War II: Photos We Remember

Hugo Jaeger—Time & Life Pictures/Getty Images

World War II: Photos We Remember

World War II: Photos We Remember

Hugo Jaeger—Time & Life Pictures/Getty Images

World War II: Photos We Remember

World War II: Photos We Remember

Hugo Jaeger—Time & Life Pictures/Getty Image

World War II: Photos We Remember

World War II: Photos We Remember

W. Eugene Smith—Time & Life Pictures/Getty Image

World War II: Photos We Remember

World War II: Photos We Remember

Wallace Kirkland—Time & Life Pictures/Getty Images

World War II: Photos We Remember

World War II: Photos We Remember

Gabriel Benzur—Time & Life Pictures/Getty Images

World War II: Photos We Remember

World War II: Photos We Remember

Bernard Hoffman—Time & Life Pictures/Getty Image

World War II: Photos We Remember

World War II: Photos We Remember

Ralph Morse—Time & Life Pictures/Getty Images

World War II: Photos We Remember

World War II: Photos We Remember

W. Eugene Smith—Time & Life Pictures/Getty Images

World War II: Photos We Remember

World War II: Photos We Remember

W. Eugene Smith—Time & Life Pictures/Getty Images

World War II: Photos We Remember

World War II: Photos We Remember

Peter Stackpole—Time & Life Pictures/Getty Images

World War II: Photos We Remember

World War II: Photos We Remember

W. Eugene Smith—Time & Life Pictures/Getty Images

World War II: Photos We Remember

World War II: Photos We Remember

Frank Scherschel—Time & Life Pictures/Getty Images

World War II: Photos We Remember

World War II: Photos We Remember

Joe Scherschel—Time & Life Pictures/Getty Images

World War II: Photos We Remember

World War II: Photos We Remember

Carl Mydans—Time & Life Pictures/Getty Images

World War II: Photos We Remember

World War II: Photos We Remember

Alfred Eisenstaedt—Time & Life Pictures/Getty Image

More Like This

Louisville, Kentucky: Great Ohio River Valley Flood 1937 history

Multiple Placements and Specs are Available

College boxing at Wisconsin history

When College Boxing Packed ‘Em In

Bizarre Bicycles history

Bizarre Bicycles

Future of Shopping history

What the Future of Shopping Looked Like In 1949

Haglia Sophia history

The Rescue of a Turkish Treasure

Fraternity Initiation history

The Most Civilized Fraternity Initiation Ever