EXCERPT: Occasionally [Catalina de Erauso] held a legitimate job. She joined the army, became a second lieutenant, and served under her older brother Michael [in New Spain], fighting the Indians. But Catalina had a hair-trigger temper and a real talent with pistols, daggers, and swords. Not counting battlefield slayings, she murdered eight men, only one of whom she was sorry about – the “mistaken identity” killing of her own sibling in a nighttime duel.
[Vicki León, Uppity Women of the Middle Ages, Conari Press, 1997, p. 186]
Wikipedia: Catalina de Erauso or Katalina Erauso, also known in Spanish as La Monja Alférez (English, The Nun Lieutenant) (1592, San Sebastián, Spain—1650, Cuetlaxtla (near Orizaba), New Spain), was a semi-legendary personality of the Basque Country, Spain and Spanish America in the first half of the 17th century.
Catalina de Erauso was daughter and sister of soldiers from the city of San Sebastián in Spain. Her father was Miguel de Erauso and her mother María Pérez de Gallárraga y Arce. She was expected to become a nun but abandoned the nunnery after a beating at the age of fifteen, just before she was to take her vows. She had not ever seen a street, having entered the convent at the age of four .
She dressed as a man, calling herself "Francisco de Loyola", and left on a long journey from San Sebastian to Valladolid. From there she visited Bilbao, where she signed up on a ship with the assistance of other Basques. She reached Spanish America and enlisted as a soldier in Chile under the name Alonso Díaz Ramírez de Guzmán. She served under several captains in the Arauco War, including her own brother, who never recognized her.
After one fight in which she killed a man and was wounded fatally, she revealed her sex in a deathbed confession. She however survived after four months of convalescence and left for Guamanga.
To escape yet another incident, she confessed her sex to the bishop, Fray Agustín de Carvajal. Induced by him she entered a convent and her story spread across the ocean. In 1620, the archbishop of Lima called her. In 1624, she arrived in Spain, having changed ship after another fight.
She went to Rome and toured Italy, where she eventually achieved such a level of fame that she was granted a special dispensation by Pope Urban VIII to wear men's clothing.
Her portrait by Francesco Crescenzio is lost. Back in Spain, Francisco Pacheco (Velázquez's father-in-law) painted her in 1630.
She again left Spain in 1645, this time for New Spain in the fleet of Pedro de Ursua, where she became a mule driver on the road from Veracruz. In New Spain she used the name Antonio de Erauso.
She died in Cuetlaxtla, New Spain in 1650.