During both world wars, women proved to be a major asset to the war effort, by replacing male workers in munitions factories and on farms, and continuing to support troops as messengers, administrators and medical staff.
Women have always played a role in war, sometimes by fighting but usually in support of the troops. Famous Welsh nurse Betsi Cadwaladr demonstrated this in the Crimean War between 1853 and 1855. From the 19th century, industrialisation led to major changes in warfare.
After 1947, tensions between the USA and the USSR, called the Cold War, led to the frightening prospect of nuclear war. Hi-tech warfare continued to develop with warplanes, missiles and computerised tracking and launch systems becoming standard in the late 20th and 21st century.
the media plays a role in bringing detailed information to the public, making it harder to use propaganda to keep the public on side. Today, warfare is developing rapidly through new technology such as drones and guided missiles, which can launch extremely focused attacks and minimise casualties.