What significant military action occurred during "Just Cause"?

The significant military action that occurred during "Just Cause" was the overthrow of Panama's military government. This operation took place in December 1989 and led to the removal of General Manuel Noriega, who had been a key figure in Panama's political climate and was involved in drug trafficking and authoritarian governance. The U.S. aimed to restore democratic governance in Panama and protect American citizens residing there.

The operation was a direct response to Noriega's increasing hostility towards the United States, including drug trafficking issues and threats to U.S. citizens. This military intervention involved a wide array of forces and resources, highlighting the United States’ commitment to combatting drug-related crime and promoting stability in Central America.