Although it got little attention at the time, the war in Yemen began more than four years ago in July 2014. (For a full legal and political analysis of the start of the war in Yemen, see this piece at Lawfare.) Since that date the war has expanded significantly, morphing into a confusing and chaotic jumble of conflicts and players that defies neat categories. In the space below, the Arabia Foundation delves into the war and explains exactly who is fighting whom in Yemen, from the states involved to their proxy forces, and the terrorist groups that are trying to exploit the chaos and upheaval.

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