One of the mysteries of the English language finally explained.
1An appearance or show of unity; a group of people united in a common cause and presenting such a show of unity.
2Chiefly with capital initials. (The name of) any of various, especially communist, alliances or coalitions; specifically = "Popular Front".
Early 19th century. From united + front.
united front/jʊˌnʌɪtɪd ˈfrʌnt/
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