Global Wars was a professional wrestling supershow co-produced by the American Ring of Honor (ROH) and Japanese New Japan Pro-Wrestling (NJPW) promotions. The event took place on May 10, 2014, at the Ted Reeve Arena in Toronto, Ontario, Canada and aired live on internet pay-per-view (iPPV) through Ustream. The event was originally billed as "Border Wars", a name ROH had used for events in 2012 and 2013.

With the exception of one interpromotional match, wrestlers from NJPW and ROH were kept separated from each other with the bookers from each promotion handling their own half of the show. The event featured nine matches with three championships on the line; two from ROH and one from NJPW. In the undercard of the event, The Young Bucks retained the IWGP Junior Heavyweight Tag Team Championship and Jay Lethal the ROH World Television Championship. In the main event, Adam Cole successfully defended the ROH World Championship against former champion Kevin Steen.

Prior to Ring of Honor's (ROH) February 2014 HonorCon weekend in Philadelphia, Pennsylvania, the promotion had teased a "big announcement". The announcement was made during an ROH event on February 22, when ROH chief operating officer Joe Koff and booker Delirious along with New Japan Pro-Wrestling (NJPW) chairman Naoki Sugabayashi and his translator, referee Tiger Hattori, entered the ring to reveal a partnership, which would see the Japanese promotion's top wrestlers come over to North America for joint shows in May 2014. The first, titled Global Wars, would be set to take place on May 10 in Toronto, Ontario, and the second, titled War of the Worlds, on May 17 in New York City, New York. NJPW billed the events as its second tour of North America, following the NJPW Invasion Tour 2011 three years earlier. During the next few weeks, ROH announced the NJPW wrestlers taking part in the two events; IWGP Heavyweight Champion Kazuchika Okada,IWGP Intercontinental Champion Hiroshi Tanahashi,Shinsuke Nakamura, NJPW bookers Gedo and Jado,Takaaki Watanabe,Jushin Thunder Liger,Kushida,Karl Anderson,Forever Hooligans (Alex Koslov and Rocky Romero), and The Young Bucks (Matt and Nick Jackson), who are regulars for both NJPW and ROH, holding the IWGP Junior Heavyweight Tag Team and ROH World Tag Team Championships between the two promotions. NJPW workers not taking part in the North American tour were instead announced for a simultaneous tour of Thailand. The first non-NJPW worker announced for the event was ROH regular A.J. Styles, who, however, signed a NJPW contract before the end of March. ROH also announced that the two promotions would host a tryout seminar on May 13 and 14 in Bristol, Pennsylvania. On March 27, ROH announced that the two events would be broadcast live on internet pay-per-view through Ustream, which had successfully broadcast NJPW iPPVs for the past two years. Previously, ROH had used various sites to broadcast their own iPPVs, often facing streaming issues, which even led to the promotion announcing they were no longer going to be doing live iPPVs.

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