USA vs China and Russia

http://www.businessinsider.com/most-powerful-militaries-in-the-world-ranked-2018-2#6-united-kingdom-20
https://www.thebalance.com/u-s-military-budget-components-challenges-growth-3306320
https://www.bloomberg.com/view/articles/2017-12-14/russia-s-military-is-leaner-but-meaner
http://tass.com/defense/982575
https://thediplomat.com/2018/03/chinas-2018-military-budget-new-numbers-old-worries/
https://en.wikipedia.org/wiki/List_of_countries_by_GDP_(nominal)
https://www.globalfirepower.com/country-military-strength-detail.asp?country_id=united-states-of-america
https://www.globalfirepower.com/country-military-strength-detail.asp?country_id=russia
http://www.military-today.com/tanks/top_10_main_battle_tanks.htm
https://en.wikipedia.org/wiki/List_of_equipment_of_the_Russian_Ground_Forces
http://nationalinterest.org/blog/the-buzz/russias-armata-super-tank-could-it-beat-the-worlds-best-24318
http://nationalinterest.org/blog/the-buzz/chinas-deadly-type-99-tank-vs-russias-t-90-americas-m-1-17836?page=3
https://www.forbes.com/sites/ralphjennings/2017/10/03/chinas-new-fighter-jets-beat-these-3-countries/#76b99b293b89
https://en.wikipedia.org/wiki/List_of_aircraft_carriers_in_service
http://www.scmp.com/news/china/diplomacy-defence/article/2126883/china-has-started-building-its-third-aircraft-carrier
https://en.wikipedia.org/wiki/Russian_aircraft_carrier_Admiral_Kuznetsov
https://improb.com/best-military-navy-force/
http://listographic.com/top-10-navies
https://www.globalfirepower.com/navy-ships.asp
http://www.businessinsider.com/why-china-still-cant-beat-us-to-become-the-worlds-most-powerful-navy-2017-5