In 1945, during the final stages of World War II, Iraq joined the United Nations and became a founding member of the Arab League. In 1948, massive violent protests, known as the Al-Wathbah uprising, broke out across Baghdad as a popular demand against the government treaty with the British, and with support from the communists. More protests continued in the spring, but were interrupted in May, when martial law was imposed after Iraq entered the 1948 Arab–Israeli War along with other members of the Arab League.