and Tunisia became the first nations to request the helicopters, ordering 16 and 24, respectively. Croatia received the first batch of 5 OH-58Ds at the Zadar-Zemunik air base on 30 June 2016. In early 2018, Greece was granted 70 OH-58Ds via an FMS arrangement, the type has been initially stationed at Hellenic Army Aviation air base at Stefanovikio. In March 2020, the U.S. Army selected the Bell 360 Invictus and Sikorsky Raider X as part of the Future Attack Reconnaissance Aircraft (FARA) program to fill the capability gap left by the retirement of the OH-58. On 9 July 2020, the US Army retired its last OH-58Cs from active service at Fort Polk. Variants OH-58A The OH-58A Kiowa is a four-place observation helicopter. It has two-place pilot seating, although the controls in the left seat are designed to be removed to carry a passenger up front. During its Vietnam development, it was fitted with the M134 Minigun, a 7.62 mm electrically operated machine gun. The Australian Army leased eight OH-58As in 1971 in Vietnam for eight months. The Australian Government procured the OH-58A for the Australian Army and Royal Australian Navy as the CAC CA-32. Licensed produced in Australia by Commonwealth Aircraft Corporation, the CA-32 was the equivalent of the 206B-1 (upgraded engine and longer rotor blades). The first twelve of 56 were built in the U.S. then partially disassembled and shipped to Australia, where they were reassembled. Helicopters in the naval fleet were retired in 2000. A total of 74 OH-58As were delivered to the Canadian Armed Forces as COH-58A and later redesignated CH-136 Kiowa. As many as 12 surplus Kiowas were sold to the Dominican Republic Air Force, and others sold privately in Australia. In 1978, OH-58As began to be converted to the same engine and dynamic components as the OH-58C. In 1992, 76 OH-58A were modified with another engine upgrade, a thermal imaging system, a communications package for law enforcement, enhanced navigational equipment and high skid gear as part of the Army National Guard's (ARNG) Counter-Drug RAID program. The U.S. Army retired its last OH-58A in November 2017. OH-58B The OH-58B was an export version for the Austrian Air Force. OH-58C Equipped with a more robust engine, the OH-58C was supposed to solve issues regarding the Kiowa's power. In addition to the upgraded engine, it had unique IR suppression systems mounted on its exhaust. Early OH-58Cs had flat-panel