latest wtyp taught me about the 1981 patco strike of air traffic controllers in the usa. this strike was broken by the reagan administration:

On August 3, 1981, over 13,000 ATCs went on strike. […] Two days into the strike, the Reagan administration gave the striking ATCs 48 hours to return to their jobs. Only 875 union members returned to work following Reagan’s request. During this time, new ATCs were being trained and replacing the striking union members. […] Only 1,300 of the striking workers were able to retain their jobs, and none of them attained their demands.

see also the 1998 australian port lockout, where the howard government actively helped patrick corporation fire over 1400 unionised dock workers.