The US has historically asked for international support when brewing conflicts in the Middle East boiled over.
Houthi rebels have claimed responsibility for strikes on key Saudi oil facilities. How they've grown their military strength.
The Houthis belong to the Shiite branch of Islam. The Houthi insurgency began in the early 1990s, spurred in part by growing influence of different Sunni branches of Islam.
Yemen now needs a new kind of politics where its people must be allowed to make their own future.
Qatar withdrawing its troops has reignited tensions between Eritrea and Djibouti which the UN and African Union are trying to mediate. This comes as Eritrea is also embroiled in the Yemen civil war.