Horrifying footage from the 1930s shows how Spain was used as a testing ground for Nazi weapons during the civil war.
Clips taken over the course of the brutal conflict, which left nearly one million people dead, show civilians running for cover as planes drop hundreds of bombs on the Spanish cities that remained loyal to the government during General Franco's fascist uprising.
Some Spanish towns were completely destroyed and displaced people can be seen wandering the streets aimlessly.
Another disturbing clip shows mothers weeping as they carry their children through the wreckage.
The Spanish Civil War started in July 1936, and ended when General Franco declared himself the 38th leader of the country less than three years later.