Dimensional Expedition

The kingdom is on the verge of collapse under the attack of disaster. In this desperate situation, we are assisted by an army from another world. The arrows fired from their longbows called 'rifles' can easily penetrate any solid armor. Their war horses named 'Tanks', with iron hooves made of steel, were enough to crush an entire army of heavily armored charging knights. Their eagle, named 'Fighter', can soar in the sky and fight against unrivaled dragons. But the most interesting thing is their thing called Computers and the Internet... Wait! Who cut off my WIFI! Recorded in the "Kingdom Archmage's Notes" . TXt file. =================PS: Essentially, it is a story about infrastructure construction in a different world.