Iran has benefitted from the United States’ progressive withdrawal from the Middle East. Saudi Arabia sees this in a highly unfavorable light and is currently asserting itself as an increasingly active region power. To keep Iran’s expansion in check, Riyad will not think twice about military involvement, whether it be in Syria or Yemen. A Saudi-Iranian confrontation should not be seen as Sunni-Shiite opposition however, Saudi Arabia’s foreign policy is not aligned with religious considerations.