Bruce Riedel writes: As the war in Yemen resumes after a short humanitarian truce, the stakes are getting higher for Saudi Arabia’s princes.

The Royal Saudi Air Force and its allies resumed their bombing campaign this week after a five-day cease-fire to allow humanitarian supplies into Yemen. Saudi Arabia’s 29-year-old Defense Minister Prince Mohammed bin Salman has staked his future and his country’s on achieving some kind of victory in the kingdom’s war in Yemen. A truce that leaves Sanaa under the control of what the Saudis claim is an Iranian protégé regime is clearly not a decisive victory for the royals.

Instead — after weeks of air attacks on the Zaydi Shiite Houthi rebels and their allies — the prince’s war looks like a stalemate. The immense damage done to Yemen’s weak infrastructure has created considerable bad blood between Yemenis and their rich Gulf neighbors that will poison relations for years. Yemenis always resented their rich brothers, and now many will want revenge. Iran is scoring a victory on its Gulf rival without any cost to Tehran and with only limited Iranian assistance to the Zaydis. [Continue reading…]