Ice hockey has been an Olympic sport since 1920. But it wasn’t until 1995 that a big agreement was made: NHL players could finally play in the Olympics. It started with a trial run at the 1998 Nagano Games, where a Czech team led by Jaromir Jagr and goalie Dominik Hasek surprised many by winning gold over Russia.

The US had been a dominant force for much of the tournament, and a semi-final game between them and the Soviet Union would go down in history as the “Miracle on Ice.” Amid a tense 3-3 tie, Mike Eruzione picked up a loose puck in the neutral zone, used his defenseman as a screen and fired a wrist shot past the goalie to score what’s become known as one of the greatest moments in Olympic sports history.

From 1920 to 1988, the Olympic ice hockey tournament usually began with a round-robin of games and medals were awarded based on that round. In 1992, they introduced playoffs, and in 1998 they changed the format again to fit the NHL’s schedule by allowing teams to include NHL players from the start of the tournament.

The 2018 PyeongChang Games were the first to feature an NHL-sized rink, which means the competition was more intense than ever before. It also saw some unexpected upsets — most notably, when the United States knocked off Canada in a thrilling shootout.