On Memorial Day, we honor the individuals in the U.S. Armed Forces who have given their all serving our country. Memorial Day began in the 1800s when women began putting flowers on the gravestones of soldiers, leading the day to be known at the time as Decoration Day. In addition to the decoration of graves that led to Memorial Day, women have had an important presence during wartime. Even as far back as the Revolutionary War, women were nurses, cooks, seamstresses, fighting while disguised as men, and acting as spies. As time went on, women became involved with scientific developments that have impacted wartime efforts. Their intellects contributed to nuclear fission, cryptography, compilers for programming, wireless communication security, and Kevlar vests.