Here is an interesting read on nurses who served during WWII.
At the time of the attack on Pearl Harbor, there were less than 1,000 women serving in the Army Nurse Corps; but by the time the war ended four years later, over 59,000 nurses had joined the Corps.
Nurses had to graduate from nursing school to be accepted by the Army, so when the U.S. entered the war, the thousands of nurses who first joined the Corps (there were 12,000 within six months of Pearl Harbor) had either already been working in hospitals or had recently passed their nursing exams. But as the war progressed, the demand for trained nurses grew, so between 1943 and 1948 the government paid for women to attend nursing school. As a result, young women began entering nursing school with the express goal of enlisting in the Army (or Navy) upon graduation. Learn more.