Human history has been full of battles and wars, some big and some small. But if World War 3 were to happen, it might be humanity's biggest battle yet. Advanced technology, massive troops, and more intensive strategy would all be involved. Why would something like this happen? And how would this war be fought? Join our Patreon community and help make What If better: http://bit.ly/whatif-patreon Watch more what-if scenarios: Planet Earth: https://www.youtube.com/watch?v=_-HhCwYD7rc The Cosmos: https://www.youtube.com/watch?v=gfuJyVkMH_g Technology: https://www.youtube.com/watch?v=CS3bBO05fpU Your Body: https://www.youtube.com/watch?v=QmXR46TrbA8 Humanity: https://www.youtube.com/watch?v=fdCDQIyXGnw Tweet us your what-if question to suggest an episode: http://bit.ly/whatif-twitter What If elsewhere: Instagram: http://bit.ly/whatif-instagram Twitter: http://bit.ly/whatif-twitter Facebook: http://bit.ly/facebook-whatif What If comes in other languages! What If in Spanish: http://bit.ly/YT-Spanish-what-if What If in Mandarin: http://bit.ly/YT-Chinese-what-if Suggest an episode (detailed): http://bit.ly/suggest-whatif T-shirts and merch: http://bit.ly/whatifstore Feedback and inquiries: https://underknown.com/contact/ What If is a mini-documentary web series that takes you on an epic journey through hypothetical worlds and possibilities. Join us on an imaginary adventure — grounded in scientific theory — through time, space and chance, as we ask what if some of the most fundamental aspects of our existence were different.