Saudi Arabia’s intervention in Yemen is not surprising given Riyadh’s past policies and current perspectives on Arabian Gulf security. Yemen has always suffered from varying degrees of chaos and civil strife. Even in the best of times, large areas of the country lacked government control, and few if any in the region saw it as a functioning nation state. Whatever Gulf Arab leaders may have said publicly, most have viewed Yemen as a loose collection of autonomous or even independent regions, held together only by the lines drawn on a map. As long as Yemen’s problems remained contained within those lines, the Kingdom and its allies could engage with Yemen’s leadership, particularly the governments of President Ali Abdullah Saleh and Interim President Abdu Rabbu Mansour Hadi, to debate solutions—but this is no longer the case.