2012 Ports of Los Angeles and Long Beach strike
In 2012, members of the International Longshore and Warehouse Union were locked out by the employers at the ports of Los Angeles and Long Beach in the U.S. state of California. This was due to issues over labor contract negotiations between port employers and the ILWU's Local 63 Office and Clerical Unit (OCU), which represents about 800 clerical workers at the ports.
Source: Wikipedia — 2012 Ports of Los Angeles and Long Beach strike (CC BY-SA 4.0)