What significant military operation did SEAL teams participate in during 1989?

SEAL teams participated in Operation JUST CAUSE in 1989, which was a military operation aimed at overthrowing Panamanian leader Manuel Noriega. This operation was significant as it involved a variety of military forces and showcased the versatility and effectiveness of Special Operations forces, particularly the Navy SEALs. They were deployed to secure key locations, conduct reconnaissance, and engage in direct action missions against Noriega's forces.

This operation was a response to Noriega's increasing hostility towards the United States and his involvement in drug trafficking and human rights abuses. The successful execution of JUST CAUSE demonstrated the importance of Special Warfare units in complex military engagements, emphasizing their training in unconventional warfare and direct action capabilities.

While other operations mentioned in the options were indeed carried out by Navy SEALs, they occurred much later than 1989, making JUST CAUSE the correct choice for that specific year and context.