Iran launched a missile attack Monday on a U.S. military base in Qatar and Iraq, retaliating for the American bombing of its nuclear sites and escalating tensions in the volatile region. The following map shows where the U.S.’s other key military bases near Iran.

Few people inside the administration knew the president was moving forward with plans for the attack, even late last week.

President Donald Trump’s decision to bomb Iranian nuclear facilities over the weekend falls in a decades-long tradition of military strikes of debatable legality that the other branches of government have been unwilling or unable to check,