Bradley's first assignment was with the 19th Infantry Regiment. He was promoted to first lieutenant on July 1, 1916, followed by another promotion to captain on May 15, 1917. By this time, the United States had entered World War I. He was promoted yet again, to major in the National Army, on June 17, 1918. He, like many other U.S. Army officers of his generation, did not see service in World War I.[1][2]
After over two years spent training in the United States, including two months spent training in the Hawaiian Islands from July−September 1944,[5] Bradley and his 96th Division were sent to the Pacific theater of war to fight against the Empire of Japan.
The division saw action for the first time during the battle of Leyte in October 1944. The division continued fighting in mainly small-unit actions until, by Christmas Day 1944, all organized resistance by the Japanese had ceased. From then onwards, Bradley's 96th Division was, for the next three months, engaged mainly in security duties, clearing up the rest of the island of Japanese resistance, and training for future operations, most notably the upcoming invasion of Okinawa.[5]
The battle of Okinawa, codenamed Operation Iceberg, was to be the largest amphibious assault of the entire Pacific War and the battle itself was to last almost three months, from early April until mid-June 1945.[1]
The initial invasion of Okinawa was the largest amphibious assault of the Pacific War and the subsequent battle saw one of the highest casualty rates of any campaign fought during World War II, with the Japanese losing well over 100,000 men, and the Allies suffering 50,000 casualties, roughly half the number of the Japanese. In addition, over 100,000 civilians became casualties, with some 12,000 of them being killed.[1]
The operation's primary objective was to secure the island, which was only 340 miles away from the mainland of Japan which, after a very long campaign of leapfrogging (or island hopping), the Allies were now approaching. Okinawa was to be used as a base for an air offensive over Japan and intended to support Operation Downfall, the Allied invasion of mainland Japan. However, the atomic bombings of Hiroshima and Nagasaki brought an end to the war.
As a result of the hard fighting during the fighting on Okinawa, Bradley's 96th Division was given a unique honor in the shape of the Presidential Unit Citation. The division was one of just four to be awarded with this citation during the war.
After the war
Bradley, after well over three decades of continuous military service, retired from the army in 1947, and was granted the permanent rank of major general.
On July 30, 1957, Bradley, who had then been undergoing treatment for a heart ailment, was found dead after drowning in a swimming pool in his daughter Mildred's home in Lafayette, California.[1]
On December 6, 1916, Bradley married Pauline Clarkson, from San Antonio, Texas, in Del Rio, Texas and together went on to have only a single child, a daughter, Mildred C. Bradley Walter. On September 28, 1949, Bradley's wife Pauline died in San Mateo, California.