Explanation:
Picasso's Guernica was created in 1937 after the bombing of Guernica. In 1937, a couple of years before WWII, Nazi Germany and Fascist Italy bombed the northern Spain town of Guernica, having killed thousands of people, civilians included. This artwork was intended to show the events of that horrific bombing.
However, the main message behind Guernica is an anti-war one. Picasso, a Spaniard himself, was obviously hurt by the events that took place in that historic town, and wanted to give an antifascist message to the world through this painting. It contains bulls and horses, some of important elements of Spanish culture, so it is in a symbol of love for his home country, as well as hatred for the war that destroyed so many lives and a cultural heritage for the Basque.
