The goal is for the Asian country to develop a solid and effective self-defense capacity.

The United States on Thursday approved the sale of up to 36 F-15 fighter jets and related equipment to Indonesia for $13.9 billion, according to a statement from the US Defense Security Cooperation Agency.

The US State Department has decided to approve a possible military sale of F-15 aircraft, engines and related equipment, including ammunition and communication systems, to the Indonesian government, after Jakarta announced last year its willingness to modernize its Armed Forces. According to the statement, “it is vital to US national interests to help Indonesia develop and maintain a strong and effective self-defense capability.”

The proposed sale is expected to help Indonesia “meet current and future threats” and contribute to US national security foreign policy objectives by “enhancing the security of an important regional partner that is a force for political stability and economic progress in the Asia-Pacific region.