Two U.S. KC-135 aerial refueling aircraft arrived at Bezmer Air Base in Bulgaria on July 31, 2026 [1], [3].
The deployment increases the logistical reach of U.S. military operations in the Middle East, while heightening diplomatic tensions between Sofia and Tehran.
Iran issued a direct warning to the Bulgarian government regarding the presence of the aircraft [2]. Tehran said Sofia must ensure its territory is not used as a launchpad for attacks against Iran [2].
The aircraft landed at the air base in southeastern Bulgaria to provide critical fuel support for missions in the Middle East [1], [4]. The deployment followed a Bulgarian parliamentary vote that approved the move with a 136-13 margin [5].
While the aircraft arrived at the end of July, reports indicate the two refueling planes departed Bulgaria during the first week of August [2].
The U.S. military said it stands ready to counter threats as operations in the Middle East continue [4]. The use of Bezmer Air Base allows the U.S. to extend the flight range of its combat aircraft without relying solely on bases located closer to the conflict zone [1].
Bulgaria has maintained a strategic partnership with the U.S., though this specific deployment sparked immediate friction with Iranian officials [2], [3]. The Bulgarian government proceeded with the hosting agreement despite the warnings from Tehran [5].
“Iran urged Sofia to ensure its territory is not used as a launchpad for attacks against Iran.”
The brief deployment of KC-135 tankers to Bulgaria demonstrates the U.S. military's ability to utilize European allies for logistical support in Middle Eastern theaters. By shifting refueling assets to the Balkans, the U.S. can distribute its operational footprint, though such moves risk drawing non-combatant allies into the direct diplomatic crossfire between the U.S. and Iran.
