Bulgarian–American Joint Military Facilities were established by a Defence Cooperation Agreement signed by the United States and Bulgaria in April 2006. Under the agreement, U.S. forces will train at these bases, which remain under Bulgarian command and under the Bulgarian flag.

Graf Ignatievo Air Base is located in the village of Graf Ignatievo, about 10 kilometres (6.2 mi) north of Plovdiv, Bulgaria's second largest city. It is the sole remaining fighter base of that state and houses two squadrons of jet aircraft.