War may break out at any moment.

Source: Tatoeba

He returned home from Europe in 1941, when the war broke out.

Source: Tatoeba

World War I broke out in 1914.

Source: Tatoeba

The next four to six weeks are crucial in controlling the massive Ebola outbreak.

Source: Tatoeba

An argument erupted between her and her father.

Source: Tatoeba

All humanity will suffer if a nuclear war breaks out.

Source: Tatoeba