Seafarers international union afl cio

The **Seafarers International Union (SIU) of North America, AFL-CIO** was founded in 1938 to represent merchant mariners and maritime workers in the United States and Canada. Throughout World War II, SIU members played a critical role in supporting Allied operations by crewing supply ships and transporting vital materials across dangerous waters, often facing enemy submarines and attack. In subsequent conflicts such as the Korean and Vietnam Wars, SIU crews continued to provide essential logistical support, ensuring the steady flow of troops, equipment, and supplies. Today, the SIU remains a key component of the U.S. Merchant Marine, supporting national defense through the operation of ships in the Maritime Security Program and Ready Reserve Force.