Arthur Cook was 19 years old when Adolf Hitler signs an order to begin the systematic euthanasia of mentally ill and disabled people. Adolf Hitler was a German politician, demagogue, and Pan-German revolutionary, who was the leader of the Nazi Party, Chancellor of Germany from 1933 to 1945 and Führer ("Leader") of Nazi Germany from 1934 to 1945. As dictator, Hitler initiated World War II in Europe with the invasion of Poland in September 1939, and was central to the Holocaust.
Arthur Cook was 24 years old when World War II: German forces in the west agree to an unconditional surrender. The German Instrument of Surrender ended World War II in Europe. The definitive text was signed in Karlshorst, Berlin, on the night of 8 May 1945 by representatives of the three armed services of the Oberkommando der Wehrmacht (OKW) and the Allied Expeditionary Force together with the Supreme High Command of the Red Army, with further French and US representatives signing as witnesses. The signing took place 9 May 1945 at 00:16 local time.
Arthur Cook was 32 years old when Jonas Salk announced the successful test of his polio vaccine on a small group of adults and children (vaccination pictured). Jonas Edward Salk was an American medical researcher and virologist. He discovered and developed one of the first successful polio vaccines. Born in New York City, he attended New York University School of Medicine, later choosing to do medical research instead of becoming a practicing physician. In 1939, after earning his medical degree, Salk began an internship as a physician scientist at Mount Sinai Hospital. Two years later he was granted a fellowship at the University of Michigan, where he would study flu viruses with his mentor Thomas Francis, Jr.
Arthur Cook was 44 years old when Thirty-five hundred United States Marines are the first American land combat forces committed during the Vietnam War. The United States Marine Corps (USMC), also referred to as the United States Marines, is a branch of the United States Armed Forces responsible for conducting amphibious operations with the United States Navy. The U.S. Marine Corps is one of the four armed service branches in the U.S. Department of Defense (DoD) and one of the seven uniformed services of the United States.