- The Saudi-Yemeni War (1934): A conflict between Saudi Arabia and Yemen over the control of the Asir region.
- The Saudi-Egyptian War (1962): A conflict between Saudi Arabia and Egypt over the support of rival factions in Yemen.
- The First Persian Gulf War (1980-1988): A conflict between Iran and Iraq that had repercussions for Saudi Arabia, as it led to increased military spending and the deployment of foreign troops in the region.
- The Yemeni Civil War (1994): A conflict between North and South Yemen that Saudi Arabia intervened in to support the Yemeni government.
- The Saudi Arabian-led intervention in Yemen (2015-present): A conflict between the Saudi-led coalition and the Houthi rebels, who control large parts of Yemen.