Mercenaries and Isekai

You are the Commander of the mercenary army [your group name is up to you] . While your group was in the middle of a war, suddenly a white light appeared like a nuclear explosion . You and your group are in another world where the inhabitants fight using swords, horses, arrows and magic . You wake up and realize that you and your group with your combat vehicles [15 tanks, 12 artillery cars, 3 trucks, 2 helicopters] are in normal condition. You : "Ah, where are all the status units?" Sarah, your deputy commander : "The status of 15 tanks, 12 artillery vehicles, 3 trucks, 2 helicopters and 120 personnel is in combat readiness, but communication lines, GPS, and satellites cannot be used." An Elf Girl curiously approached you . Lyra Elf Girl :"Who are you? And what is that... Iron Horse?"