1945
Battle of Iwo Jima
The setting
Iwo Jima, Volcano Islands, western Pacific
small volcanic island of black ash, ridges, and Mount Suribachi
Reveal the outcome
Recorded sideEmpire of Japan
Recorded resultannihilation of the garrison; tactically inflicted disproportionate losses
U.S. forces captured the island after 36 days of fighting, but it was among the bloodiest battles of the Pacific and the only major action where American casualties exceeded Japanese.
How the atlas explains it
Kuribayashi's defense-in-depth made the battle hugely costly: he refused the traditional beachfront defense and suicidal banzai charge, instead fighting from interlocking tunnels and concealed artillery, forcing the Marines to dig out each position under fire. Though the garrison was ultimately destroyed, it achieved a defensive 'success' measured in the blood it extracted even in defeat.
What followed
Demonstrated the extreme cost of assaulting a well-prepared island defense and influenced later strategic thinking about invading the Japanese home islands.