The most recent umpire strike in Minor League Baseball history was the strike of 2006. It involved primarily a monetary dispute between the Association of Minor League Umpires (AMLU), a trade union, and the Professional Baseball Umpire Corporation (PBUC), a management company. The dispute resulted in the hiring of replacement umpires for a number of games, followed by minor concessions by both parties, resulting in a slight wage increase for umpires employed in Minor League Baseball.