War of the Worlds UK was a multi-promotional professional wrestling "supershow" tour jointly produced by Mexico's Consejo Mundial de Lucha Libre (CMLL), New Japan Pro-Wrestling (NJPW), the UK based Revolution Pro Wrestling (RPW), and the U.S.-based Ring of Honor (ROH).

The following year, War of the Worlds was held over two days at the 2300 Arena in Philadelphia, Pennsylvania and in 2016 it was expanded to a three-show tour with shows taking place in Dearborn, Michigan, Toronto, Ontario and New York City.

[5] On May 22, ROH announced a second War of the Worlds tour, this time taking place in the United Kingdom, for which they and NJPW would be joined by Consejo Mundial de Lucha Libre (CMLL) and RPW.

[6] The War of the Worlds UK tour featured professional wrestling matches that involved different wrestlers from pre-existing scripted feuds and storylines.

[7] On August 9, ROH announced their sole World Championship match of the tour, which pitted defending champion and Bullet Club member Cody against Los Ingobernables de Japón member Sanada.