Wanda Gertz (1896–1958) joined the Polish Legion in World War I to
fight on the Eastern Front while posing as "Kazimierz Zuchowicz". Later
she joined the Women's Voluntary Legion, and during World War II she
commanded an all-woman sabotage unit of the Home Army.
Dorothy Lawrence (1896–1964) was a British reporter who served as a man
in the army during World War I.
Zoya Smirnow (1897/98 – after 1916) was a Russian schoolgirl who along
with 11 other friends ran away from their Moscow school and disguised
themselves as men and joined the Russian army where they fought in
Galicia and the Carpathians during World War I. After a death and
number of injuries in the group, Smirnow's sex was discovered. She
recounted their story to the English press.
Frieda Belinfante (1904–1995) was a prominent musician and World War II
Dutch Resistance fighter who disguised herself as a man for 6 months to
avoid capture by the Gestapo.
Sylvin Rubinstein (1914–2011) was a member of the Polish resistance who
disguised himself as a woman to perform espionage missions and
assassinations.
Ehud Barak (b. 1942), the later prime minister of Israel, disguised
himself as a woman to assassinate members of the Palestine Liberation
Organization in Beirut during the 1973 Israeli raid in Lebanon.