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Mexican–American War: The United States declares war on the Federal Republic of Mexico following a dispute over the American annexation of the Republic of Texas and a Mexican military incursion.

During the Anglo-Iraqi War, British troops take Fallujah.

Battle of Yarmouk: Arab forces led by Khalid ibn al-Walid take control of the Levant away from the Byzantine Empire, marking the first great wave of Muslim conquests and the rapid advance of Islam outside Arabia.

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