Harry Bridges was an Australian-born American union leader, first with the International Longshoremen's Association (ILA). In 1937, he led several chapters in forming a new union, the International Longshore and Warehouse Union (ILWU), expanding members to workers in warehouses, and led it for the next 40 years. He was prosecuted for his labor organizing and designated as subversive by the U.S. government during the 1930s, 1940s, and 1950s, with the goal of deportation. This was never achieved.

The International Longshoremen's Association (ILA) is a North American labor union representing longshore workers along the East Coast of the United States and Canada, the Gulf Coast, the Great Lakes, Puerto Rico, and inland waterways; on the West Coast, the dominant union is the International Longshore and Warehouse Union. The ILA has approximately 200 local affiliates in port cities in these areas.