Camp al-Alam, a Saudi-run training base in Yemen's Shabwa province, had no air defense or early warning systems when three Houthi ballistic missiles hit it on October 19. At least 75 people were killed and more than 200 were injured, including Saudi soldiers. UAVs circled the base for days before the attack. Saudi and Yemeni officials briefed on the attack are calling it the deadliest Houthi attack of the new war.