The Dutch East Indies crumbled faster than anyone anticipated. Japanese paratroopers landed in Palembang on 14 February 1942, and within weeks motorized columns were pushing across Sumatra. By early March, the colonial government had formally surrendered, yet for nine days afterward no Japanese soldiers had actually reached West Sumatra. The result was a strange power vacuum: Dutch authority had dissolved, but nothing had replaced it. High-ranking officials had already evacuated, and the few who remained huddled in small houses and military pensions. When Japanese troops finally arrived in Padang, rogue elements of the KNIL army under Governor Adriaan Isaac Spits briefly vowed to fight "to the last drop of blood," but organized resistance collapsed almost immediately. The speed of the transition stunned everyone -- colonizers and colonized alike.

Unlike most of occupied Indonesia, West Sumatra received a civilian governor. Yano Kenzo was the only Japanese civilian to govern any territory in the archipelago, a distinction that reflected both the region's strategic position facing the Indian Ocean and its relative distance from the oil fields that drove Japanese military priorities. Kenzo's administration relied heavily on existing local structures, dividing Minangkabau society into three pillars: adat leaders managed government administration, nationalist figures conducted propaganda, and religious leaders mobilized popular support by framing the war effort as a holy struggle to expel the Dutch. It was a calculated strategy. The Japanese needed Sumatran cooperation for their war effort, and they recognized that West Sumatra's tightly knit social networks could not simply be commanded from above -- they had to be co-opted.

Behind the political maneuvering lay a grinding system of exploitation. Thousands of Indonesians were conscripted as romusha -- forced laborers -- to build roads, railways, bridges, fortifications, and bomb shelters. The Muaro Sijunjung-Pekanbaru railway became a symbol of this suffering. Laborers, many brought from Java, worked under extreme physical demands with inadequate food and medical care. Malaria ravaged the work camps. Many never returned home, perishing at their work sites or left too ill to travel. In Padang, the Japanese used cinemas as traps: people leaving screenings were herded onto waiting trucks and taken to labor sites. The bomb shelters and tunnels they built, known as Lobang Jepang -- Japanese Caves -- still dot the landscape of cities like Padang and Bukittinggi, silent monuments to the people forced to dig them.

As the war turned against Japan by mid-1943, Sumatra's strategic importance surged. Admiral Nakamura reportedly warned that losing Sumatra meant losing the entire East Indies. The Japanese military established the Giyugun, a local defense force, the only formal military unit created in West Sumatra during the occupation. Young Minangkabau men received Japanese military training, learning discipline and tactics that their colonial rulers had deliberately withheld. The irony was potent: Japan armed and trained the very people who would soon fight for an independent Indonesia. When Japan surrendered on 15 August 1945, the Giyugun units were quietly disbanded without ceremony or explanation. Members were simply told the war was over. But the military knowledge did not vanish. Former Giyugun soldiers became the backbone of Indonesia's nascent armed forces in the revolutionary struggle that followed.

In the final days of the occupation, something remarkable happened: news of Indonesian independence reached West Sumatra before news of Japan's surrender. On 18 August 1945, a day after Sukarno and Hatta proclaimed independence in Jakarta, a postal worker named Aladin at the PTT office in Padang intercepted the announcement. He transcribed it onto telegram paper and passed it to Jahja Djalil and Arifin Aliep, who traveled to Bukittinggi and secretly printed twenty copies at the shuttered Padang Nippo newspaper office. Word spread rapidly through West Sumatra's markets and educated circles. Meanwhile, Japanese soldiers appeared melancholic and withdrawn, and the Bukittinggi radio station fell silent for days. Some Japanese troops refused to go home, seeking to settle in Indonesia or assist the independence movement. Others committed suicide in shame. A few engaged in sabotage. The occupation that had lasted three years and five months was over, but the nation it had unintentionally helped birth was just beginning.