Another agreement with Romania allows the United States to use the Mihail Kog`lniceanu base and another nearby.  The agreement was reached on 7 October during a meeting between Bulgarian Secretary of Defense Krasimir Karakachanov and US Secretary of Defense Mark Esper in the US capital. Under the agreement, no more than 2,500 U.S. military personnel will be housed in joint military facilities. Most training rotations have a small number and will be short-lived. [Citation required] During such a rotation, there may be short periods when there are two groups of 2500 soldiers at the same time in Bulgaria. Soldiers will not have family members with them. The Joint Bulgaria-America Military Facilities were created by a defence cooperation agreement signed by the United States and Bulgaria in April 2006. As part of the agreement, US forces will train on these bases, which will remain under Bulgarian command and Bulgarian flag.
The DCA grants immunity to U.S. military personnel who protect them from prosecution in that country.  However, in cases of particular importance to the Bulgarian authorities, the waiver of the Bulgarian main criminal court may be recalled (paragraph 1, Article X of the Defence Cooperation Agreement). The U.S. Embassy said the agreement is based on the NATO Force Status Agreement (SOFA). Bulgaria reserves the right to exercise its jurisdiction if it is in Bulgaria`s interest. In other cases, the United States will exercise responsibility for U.S. military and civilian personnel.  The first defence cooperation agreement between the United States and Bulgaria came into force in 2006. The Defence Cooperation Agreement came into force on 12 June 2006.
Further agreements on how to implement the Defence Cooperation Agreement are expected to be concluded in 2007. On Friday 4 November 2005, Bulgarian Prime Minister Sergei Stanichev said in a speech at the National Palace of Culture (NDK) in Sofia: "I would also like to say that the strategic partnership with the United States for Bulgaria is defined by our NATO commitments and the transatlantic dialogue agenda. … The issue of joint military installations in Bulgaria is also part of our bilateral strategic partnership. We believe that proposals to transform the armed forces and US command in Europe, including the creation of a rotating brigade stationed in Bulgaria and Romania, adequately address new security risks and threats, as well as Bulgaria`s interests and the need for increased cooperation. The United States has also signed a similar agreement with Romania and U.S. military units stationed in both Bulgaria and Romania will be known as the Joint Task Force East.  Joint military bases between the United States and Bulgaria created in accordance with the 2006 defence cooperation agreement between the United States and Bulgaria: .