Two US tanker aircraft leave Bulgaria a month after deployment angered Iran

Two United States Air Force KC-135 tanker aircraft depart Bulgaria's Bezmer Airbase on August 21, 2026, ending a month-long deployment that drew sharp criticism from Iran. The deployment, approved by the Bulgarian parliament on July 22, 2026, sparked local protests due to fears of Iranian missile strikes. While Iran accuses Bulgaria of complicity in war crimes amid the ongoing U.S.-Iran war, Bulgarian Defence Minister Dimitar Stoyanov maintains that the training flights posed no national security threat.

US tanker aircraft departure

• ▪Bulgarian Defence Minister Dimitar Stoyanov announced the departure of the two United States Air Force KC-135 tanker aircraft to reporters on August 22, 2026.
• ▪The United States requested the temporary deployment of the KC-135 tanker aircraft under an agreement governing the joint use of military facilities with Bulgaria.
• ▪Two United States Air Force KC-135 aerial refueling tanker aircraft departed from Bulgaria's Bezmer Airbase on August 21, 2026, after a month-long deployment.

US-Iran war context

• ▪Iran stated that the deployment of United States tanker aircraft to Bulgaria constituted complicity in aggression and war crimes, a charge that Bulgaria dismissed.
• ▪Iran viewed the deployment of the United States KC-135 tankers as a potential indicator of United States military readiness for extended operations in the Middle East.
• ▪The United States has been engaged in an active war with Iran since February 28, 2026.

Iranian threats to Bulgaria

• ▪Bulgarian Defence Minister Dimitar Stoyanov stated that all flights conducted by the United States KC-135 aircraft during their deployment were training missions over allied countries.
• ▪Bulgarian Defence Minister Dimitar Stoyanov stated that Bulgaria had received no information regarding direct threats to its national security during the aircraft deployment.

Bulgarian security concerns

• ▪The deployment of the United States tanker aircraft prompted protests from nearby Bulgarian residents who feared potential attacks from Iranian missiles and drones.
• ▪The Bulgarian parliament approved the temporary deployment of the United States tanker aircraft on July 22, 2026.

Bulgarian government coordination

• ▪Bulgarian Defence Minister Dimitar Stoyanov stated that Bulgaria made its decisions regarding the aircraft deployment in full coordination with the United States government based on prior information.
• ▪United States authorities could not be immediately reached for comment regarding the departure of the KC-135 tanker aircraft from Bulgaria.

3 sources