Final answer:
The subject matter of Pablo Picasso's Guernica is the bombing of a small town during the Spanish Civil War.
Step-by-step explanation:
The subject matter of Pablo Picasso's Guernica is the bombing of a small town during the Spanish Civil War. The painting depicts the bombing of the town of Guernica in northern Spain by German forces supporting General Franco. It is a powerful depiction of the devastation and terror caused by war.