The museum exists because one man decided Indonesia's military story was being told badly. After 1968, Nugroho Notosusanto, head of the Indonesian Armed Forces' history branch, surveyed the country's existing military museums and found them wanting. The Struggle Museum in Yogyakarta was underfunded. Mission statements were vague. Worst of all, separate institutions told the stories of the Army, the Navy, and the Air Force in isolation -- there was no museum that presented the military as a unified institution. Notosusanto looked abroad for models. He studied the Australian War Memorial in Canberra and the Museo Nacional de Historia in Mexico City, institutions that wove military history into national narrative rather than displaying it as a catalog of equipment. His design for Satriamandala aimed to do the same for Indonesia: not just a warehouse of artifacts, but a story about what the armed forces meant to the nation.

Wisma Yaso's transformation was neither quick nor simple. Conversion work began in November 1971, and although the museum opened the following year, development continued until 1979. The sprawling 5.6-hectare site in West Kuningan, South Jakarta, eventually divided its exhibitions among three buildings and the surrounding grounds. The main building -- Sukarno's former gift to his wife -- retained its Japanese architectural character even as its rooms filled with military dioramas and display cases. The irony was structural: a home built by one president for personal reasons became a museum opened by his successor for political ones. In January 2010, the museum received formal recognition as a Cultural Property of Indonesia, protecting it from the demolition that has consumed so many of Jakarta's older buildings.

Step outside the main building and the museum's grounds become an open-air military airfield. A North American P-51 Mustang sits alongside a B-25 Mitchell bomber. A Douglas C-47 Skytrain -- the RI Seulawah 1, which served as the first presidential aircraft of the Indonesian government -- is preserved here. A Fairey Gannet anti-submarine aircraft, a Yokosuka K5Y1 biplane trainer, a Piper Cub, a Mil Mi-4 helicopter, and a Bell 204 are all parked on the grass. The naval patrol vessel KRI Pattimura, which saw action in Papua, sits among them. On the ground, tanks and military vehicles include a Willys MB jeep that once belonged to General Sudirman, the armed forces' first commander in chief -- the same general who, while suffering from tuberculosis, led a guerrilla campaign carried on a litter for seven months. That litter is inside the museum.

Inside, 75 dioramas crafted by artisans from Yogyakarta walk visitors through Indonesian military history, from pre-independence rebellions to the national revolution and its aftermath. A Hall of Heroes contains life-size statues of military members declared National Heroes of Indonesia, with Sudirman and Oerip Soemohardjo -- the military's first chief of staff -- given places of honor at the back. Among the most significant artifacts is a draft of the Proclamation of Indonesian Independence in Sukarno's own handwriting. There are also rooms dedicated to the personal effects of four generals who shaped the armed forces: Oerip Soemohardjo, Sudirman, Abdul Haris Nasution, and Suharto himself. Nearby cases display hundreds of weapons dating from the 1940s -- rifles and grenades alongside the sharpened bamboo sticks that Indonesian fighters used when conventional arms were unavailable.

A five-story, pentagon-shaped building called Waspada Purbawisesa -- "Eternal Vigilance" -- was added to the grounds in 1987. Its purpose was specific and politically charged. After the 1984 Tanjung Priok massacre, in which military forces killed protesters from conservative Muslim groups, Suharto's New Order government intensified its emphasis on Pancasila education -- the state ideology of five principles meant to unify Indonesia's diverse population. Waspada Purbawisesa served as that ideology's military showcase, housing dioramas and artifacts from conflicts with Islamic groups both conservative and extremist, including the Darul Islam revolt. The museum averaged 48,000 annual visitors between 2006 and 2008 -- a modest number for a city of ten million, but steady enough to suggest that Satriamandala fills a role that Jakarta's newer, flashier institutions cannot: it is where the nation's military mythology lives, displayed in the home of a president's wife, guarded by aircraft that once flew in its wars.