>>11957000An accurate world map to 56BC to the Romans, plans for large sailing ships, basic antibiotics antimalarials and other meds, gunpowder and machining, accurate gauges and the metric system, a hard drive with Wikipedia, a book on Roman and world history, and finally, if I can cheat a little bit. I'd bring back plutonium.
Learn Greek and Latin, contact Cicero and show him your phone. Refer to yourself as Mars when asked who you are and say the republic is in grave danger. Give him the book on Roman history, once under Roman protection arm your garison with modern weapons. Heal the sick at the temple of Mars to gain followers, answer some of people's basic premonitions. If you can, get a school going and bring scholars from Alexandria. Overthrow Caesar by simply gassing his troops with chlorine (easily made using salt and sulfuric acid made from burning sulfur) when they line up for battle. Use this horrific show of power to earn the senates love, alternatively cursing the battle of cannae as a list of greed. They'll be massacred. Claim non-interference in politics but demand faith in the religious process of the republic.
Then use an industrial Rome to take over the entire world, eliminating all non-romans in the process, winning converts through vastly superior technology. Then, gradually reduce paganism through education and create a better world.
