Timeline of women in warfare in the United States from 1900 to 1949

• 1901: The United States establishes the Army Nurse Corps as a permanent part of the Army. The Corps remains all-female until 1955.[1][2]
• 1908: The United States establishes the Navy Nurse Corps on 13 May. The Corps remains all-female until 1965.[1][3] The first 20 nurses (the first women in the Navy) report to Washington, D.C. in October 1908. By the end of World War I, their numbers increase to 1,386. During the war, the nurses serve on transport duty overseas in England, Ireland, and Scotland.[4]

• 1913: U.S. Navy nurses (all women) serve on the transports USS Mayflower and USS Dolphin.[4]

• World War I:

During the course of the war, 21,498 U.S. Army nurses (American military nurses were all women then) served in military hospitals in the United States and overseas. Many of these women were positioned near to battlefields, and they tended to over a million soldiers who had been wounded or were unwell.[5] 272 U.S. Army nurses died of disease (mainly tuberculosis, influenza, and pneumonia).[6] Eighteen African-American Army nurses served stateside caring for German prisoners of war (POWs) and African-American soldiers. They were assigned to Camp Grant, IL, and Camp Sherman, OH, and lived in segregated quarters.[7][8][9]

Hello Girls was the colloquial name for American female switchboard operators in World War I, formally known as the Signal Corps Female Telephone Operators Unit. During World War I, these switchboard operators were sworn into the Army Signal Corps.[10] This corps was formed in 1917 from a call by General John J. Pershing to improve the worsening state of communications on the Western front. Applicants for the Signal Corps Female Telephone Operators Unit had to be bilingual in English and French to ensure that orders would be heard by anyone. Over 7,000 women applied, but only 450 women were accepted. Many of these women were former switchboard operators or employees at telecommunications companies.[10] Despite the fact that they wore Army Uniforms and were subject to Army Regulations (and Chief Operator Grace Banker received the Distinguished Service Medal),[11] they were not given honorable discharges but were considered "civilians" employed by the military, because Army Regulations specified the male gender. Not until 1978, the 60th anniversary of the end of World War I, did Congress approve veteran status and honorable discharges for the remaining women who had served in the Signal Corps Female Telephone Operators Unit.[12]

The first American women enlisted into the regular armed forces were 13,000 women admitted into active duty in the U.S. Navy during the war. They served stateside in jobs and received the same benefits and responsibilities as men, including identical pay (US$28.75 per month), and were treated as veterans after the war.

The U.S. Marine Corps enlisted 305 female Marine Reservists (F) to "free men to fight" by filling positions such as clerks and telephone operators on the home front.

In 1918 during the war, twin sisters Genevieve and Lucille Baker transferred from the Naval Coastal Defense Reserve and became the first uniformed women to serve in the U.S. Coast Guard.[13][14][15][16] Before the war ended, several more women joined them, all of them serving in the Coast Guard at Coast Guard Headquarters.[16]

These women were demobilized when hostilities ceased, and aside from the Nurse Corps the uniformed military became once again exclusively male. In 1942, women were brought into the military again, largely following the British model.[17][18]

• 1920: A provision of the Army Reorganization Act grants U.S. military nurses the status of officers, with "relative rank" from second lieutenant to major (but not full rights and privileges). U.S. Nurses (all women) serve aboard the first U.S. ship built as a floating hospital, the USS Relief (AH-1).[4]

• 1938: The (U.S.) Naval Reserve Act permits the enlistment of qualified women as nurses.[4]

• 1942: The Women's Reserve of the U. S. Coast Guard Reserve program (officially nicknamed the "SPARs"), was first established in 1942.[19]
• 1942: YN3 Dorothy Tuttle became the first SPAR enlistee when she enlisted in the Coast Guard Women's Reserve on the 7th of December, 1942.[19]
• 1942: The Marine Corps Women's Reserve (MCWR) was authorized by the U.S Congress in July 1942 to relieve male Marines for combat duty in World War II.[20]
• 1942: U.S. President Franklin D. Roosevelt signed the Public Law 689 creating the Navy’s women reserve program on 30 July 1942.[21]
• 1942: The U.S. Women's Army Auxiliary Corps (WAAC) was founded.[22]
• 1942: The name of the U.S. Women's Army Auxiliary Corps (WAAC) is officially changed to Women's Army Corps (WAC).[23]
• 1943: The U.S. Women's Army Corps recruited a unit of Chinese-American women to serve with the Army Air Forces as "Air WACs." [24]
• 1944: Public Law 238 granted full military rank to members of the U.S. Navy Nurse Corps, who were then all women.[21]
• 1945: The first five African-American women entered the Women's Reserve of the U. S. Coast Guard Reserve (SPARs): Olivia Hooker, D. Winifred Byrd, Julia Mosley, Yvonne Cumberbatch, and Aileen Cooke.[19]
• 1945: SPAR Marjorie Bell Stewart was awarded the Silver Lifesaving Medal by CAPT Dorothy Stratton, becoming the first SPAR to receive the award.[19]
• 1947: The SPARs was inactivated on 25 July 1947.[25]
• 1947: Lotus Mort became the first female warrant officer in the U.S. Marine Corps.
• 1947: The Army-Navy Nurse Act of 1947 (Public Law 36-80C) made the Army Nurse Corps and Women's Medical Specialist Corps a permanent Staff Corps of the Regular Army and Navy and gave permanent commissioned officer status to Army and Navy nurses.[26][27]
• 1948: On June 12, President Harry Truman signed Public Law 625, the Women's Armed Services Integration Act, which allowed women to become permanent, regular members of the U.S. armed forces in the Army, Navy, Marine Corps, and the recently formed Air Force. Prior to this act, women, with the exception of nurses, served in the military only in times of war. However, the act limited service of women by excluding them from Air Force and Navy vessels and aircraft that might engage in combat. On July 7, 1948, Kay Langdon, Wilma Marchal, Edna Young, Frances Devaney, Doris Robertson, and Ruth Flora became the first six enlisted women to be sworn into the regular U.S. Navy. Esther McGowin Blake was the first woman to enlist in the regular U.S. Air Force; she enlisted in the first minute of the first hour of the first day regular Air Force duty was authorized for women on July 8, 1948.[28] On October 15, 1948, the first eight women to be commissioned in the regular U.S. Navy, Joy Bright Hancock, Winifred Quick Collins, Ann King, Frances Willoughby, Ellen Ford, Doris Cranmore, Doris Defenderfer, and Betty Rae Tennant took their oaths as naval officers.[29]
  

  WAVES recruitment poster
• 1948: The position Assistant Chief of Naval Personnel for Women (ACNP(W)) was created from the original WAVES leadership position. This was the first notion of the Office of Women's Policy. The woman officer who held the position was an 0-6 for as long as she filled the billet. No flag rank was allowed per Title 10 USC 6015.[4]
• 1948: On January 31, 1948, Mrs. Fannie Mae Salter, keeper of the Turkey Point Lighthouse in upper Chesapeake Bay since 1925 and the last female keeper of a lighthouse in the United States at the time, retired from active service. This ended nearly 150 years during which women were employed as keepers of United States' lighthouses.[25]
• 1948: Colonel Katherine A. Towle became the first Director of Women [U.S.] Marines.[30] The first group of women were sworn into the regular U.S. Marine Corps.
• 1949: The authority to reestablish the Women's Reserve of the U.S. Coast Guard Reserves (SPARs), approved by the President on 4 August 1949, became effective on 1 November 1949.[25]
• 1949: The U.S. Air Force Nurse Corps was established.[1]
• 1949: The first African-American women enlisted in the U.S. Marine Corps.[1]