USA vs Canada

https://en.wikipedia.org/wiki/Canada%E2%80%93United_States_relations
https://en.wikipedia.org/wiki/History_of_Canada
https://en.wikipedia.org/wiki/Laurentia
https://www.uwgb.edu/dutchs/EarthSC102Notes/102PTEarthHist.htm
http://www.history.com/this-day-in-history/canadian-independence-day

https://en.wikipedia.org/wiki/List_of_the_largest_trading_partners_of_the_United_States
https://en.wikipedia.org/wiki/List_of_countries_and_dependencies_by_area
https://10mosttoday.com/10-longest-land-borders-in-the-world/
https://en.wikipedia.org/wiki/List_of_areas_disputed_by_Canada_and_the_United_States
http://www.thecanadianencyclopedia.ca/en/article/war-of-1812/
http://www.history.com/news/how-u-s-forces-failed-to-conquer-canada-200-years-ago
http://www.investopedia.com/articles/investing/022415/worlds-top-10-economies.asp
http://www.globalfirepower.com/country-military-strength-detail.asp?country_id=canada
https://www.theglobeandmail.com/news/politics/ottawa-broadens-fight-against-islamic-state-with-expanded-military-mission/article28661580/
http://www.cbc.ca/newsblogs/yourcommunity/2015/02/canadas-smart-gun-department-of-national-defence-wows-the-world-with-new-high-tech-assault-rifle.html
http://gizmodo.com/this-scifi-smart-gun-could-be-the-colt-45-of-the-futur-1686110748
https://en.wikipedia.org/wiki/List_of_active_Canadian_military_aircraft
http://www.rcaf-arc.forces.gc.ca/en/aircraft.page#fighter
http://www.walesonline.co.uk/whats-on/whats-on-news/nato-summit-what-nato-countries-7602909
http://www.forces.gc.ca/en/news/article.page?doc=the-canada-u-s-defence-relationship/hob7hd8s