The lives of women changed dramatically during the American Civil War. ... On the home front, women for both sides had to manage the household while their husbands and sons were off fighting battles. On the battlefield, women helped to supply the soldiers, provide medical care, and worked as spies.
If you want to shorten it it would be best to do WWII, how ever if it is a formal essay you should just spell it out.
Mexico
In the Turtle Bayou Resolutions, the rebels first articulated ideas that would become central to the Texas revolutionary movement, including allegiance to the Mexican constitution of 1824.