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    On 1 December 1945, the Allies installed boards inscribed "Fixed Field Area Boundaries" (the legal limit field region) in various outskirts of the city of Medan. Allies action was a challenge for the Pemuda. On 10 December 1945, the Allies and NICA launched a massive attack against the city of Medan. The attack caused many casualties on both sides. In April 1946, the Allies succeeded in occupying the city of Medan. Central struggle of the people of Medan and then transferred to Pemantangsiantar.

    To continue the struggle in Medan, Indonesia's local government established the People's Army Commando Regiment of Medan Area. Commander Initerus conducted to attacks against Allies in Medan territory. Almost the entire of Sumatra territory occurred in people's resistance against the Japanese, the Allies, and the Netherlands. The Sumatra battle front occurred in Padang, Bukittinggi, and Aceh.

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