Answer: Iwo Jima, Okinawa, Hiroshima.
Iwo Jima was a battle in which the American Corps landed and captured the island of Iwo Jima from the Imperial Japanese Army during WWII. The five-week battle saw some of the fiercest and bloodiest fighting of the Pacific War of WWII. However, the victory was assured from the start was Americans were overwhelmingly superior in numbers, arms and air supremacy, while the Japanese were incapable of retreating or asking for reinforcement.
Okinawa (Operation Iceberg) was the largest amphibious attack in the Pacific War of WWII. It lasted 82 days, from April 1 until June 22, 1945. 149,495 Okinawans were killed, committed suicide or went missing, out of a pre-war population of 300,000.
Hiroshima was the recipient of the nuclear bomb "Little Boy" on August 6, 1945. It directly killed 70,000 people. By the end of the year, radiation and injury meant the total death toll was around 166,000. The population before the bomb was around 340,000 to 350,000. About 70% of the city's buildings were destroyed, and 7% severely damaged.
