Iron Throne: I'm in the Otherworld Tech Tree

I, a national defense engineer, transform into a subjugated prince from another world. The enemy troops approached the city, and the civil and military officials of the Manchu Dynasty persuaded me to surrender. I lit up the technology tree with my backhand and pulled out the first modern army. When my "special team" used stealth and decapitation tactics to vaporize all the enemy generals overnight, The enemy war god finally panicked and screamed outside the city: "If you have the ability, come out and fight head-on!" I picked up the sniper rifle made of enchanted materials, the crosshair of the scope was firmly placed between his eyebrows, and whispered to the princess beside me: "Look carefully, the war in the new era is so simple and unpretentious."