Humanity across the globe is forcibly transported to the “Endless Continent.” Everyone starts with one basic troop type, and the struggle for supremacy among all races begins. The protagonist's starting unit is the lowest-level “goblin.” His territory is barren, and an orc tribe is about to crush him from the start.
But his lord's insignia mutates, allowing it to connect one way to Earth's “National Strategic Resources Department.”
At the start, facing an orc invasion, he requests reinforcements. The government sends a crate of [portable thermobaric weapons] through the insignia. As the orc chieftain charges forward with a wild laugh, what he sees is a mushroom cloud slowly rising.
He sends magic crystals back to Earth, and the government develops [mana-powered nuclear fusion reactors], giving his territory an unlimited energy supply. He sends back seeds from ancient elven trees, and under the care of the Father of Hybrid Rice, they give rise to [super magic rice] that yields fifty thousand jin per mu. While other lords are still waging war with knights and mages, the protagonist's goblin army is already driving mana-powered tanks, with an aerospace carrier overhead. He announces to all the races: “I'm not here to conquer you. I represent Earth, and I'm inviting you all to join our community of shared destiny.”