I told you to farm, and you became the Emperor of the Empire?

Barbarism, ignorance, backwardness, numbness, starving corpses everywhere, people living in misery... ... F*ck! I'll smash this era to pieces with one punch!! ... Reclaiming land, farming, building bridges, paving roads, coal mining, ore digging! Grinding experience, recruiting apostles, building an army! Spamming troops! Steamrolling everything! Gua! My torrent of steel is invincible under heaven ye!! ... Roman: "I am your destiny! All of you, kneel before me!" ... So, how did you go from farming to establishing such a massive empire and becoming the Emperor?