The country that was plagued by civil war during the eve of the second world war was:
Spain.
Explanation:
First of all, world war two took place from 1939 to 1946 officially however, the pacific war started when Japan invaded china or "Manchuria" in those times. Nevertheless, the invasion of Poland started on the 1st of September 1939. When Spain was having the civil war, which lasted from 1936- to 1939. The nationalist wanted a democratic republic and launched an attack against the crown. However, we can also intervene here to say that the first conflict to trigger the war was the Ethiopian invasion from fascist Italy in 1935. Mussolini wanted to expand and started a quest for Africa.
The Gulf of Tonkin joint resolution was passed by the US Congress so President Johnson can be authorized to take charge and use the military against Vietnam. The incident happened when the USS Maddox at Tonkin was attacked by Vietnamese using torpedos despite several warnings during a patrol round.
