The game begins during the opening hours of the Larcus incident.

As the dysfunction between the two factions ebb and wane over the years, an event known as the Larcus incident occurs on June 3, 2090, sparking the 2nd Huffman Conflict. Before the events of the game, simmering tensions led to the 1st Huffman Conflict, with the island ultimately bifurcated as a result of the war. The story in Front Mission occurs on Huffman Island, a fictional territory located in the Pacific which is in perpetual dispute between the United States of the New Continent (USN) and the Oceania Cooperative Union (OSU), both vying for control of the land for its geopolitical resources. While the first entry in this long-running series is showing its age, Front Mission 1st: Remake is a gritty, unflinching story of war and the scars it leaves both on and off the battlefield. Fifteen years later, Square Enix has licensed series remakes to developer and publisher Forever Entertainment, who have faithfully remade the Front Mission 1st experience for the Nintendo Switch.

While Western gamers had their first taste of the series with Front Mission 3 in 2000, eventually they got a chance to play the initial title when a remake of Front Mission 1st for the Nintendo DS was released in 2007. It was eventually remade for the PlayStation and released as Front Mission 1st, but neither of those versions made it stateside. The Front Mission series was first deployed in 1995 with the release of Front Mission for Super Famicon in Japan.

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