ROH 16th Anniversary was a two-night professional wrestling event produced by American promotion Ring of Honor (ROH), which took place Friday, March 9 and Saturday March 10, 2018, at the Sam's Town Hotel and Gambling Hall in the Las Vegas suburb of Sunrise Manor, Nevada. Friday's show was a pay-per-view broadcast, while Saturday's was a set of tapings for ROH's flagship program Ring of Honor Wrestling.

Brett Giehl, better known by the ring name Dalton Castle, is an American professional wrestler. He is currently signed to Ring of Honor (ROH), where he is a one-time ROH World Champion, a one-time ROH World Television Champion and a two-time ROH World Six-Man Tag Team Champion. He also makes appearances for its sister company All Elite Wrestling (AEW). He is also known for his tenure in Chikara, where he wrestled under the ring names Ashley Remington and Dalton Caroline Castle.