Navy or Marine Corps Overseas Service Ribbon (with multiple battle stars)
Navy Good Conduct Medal (with a silver star)
National Defense Service Medal
Navy or Marine Corps Expeditionary Medal
Top Ribbon (Blue with Light Blue Stripes): This is the Navy or Marine Corps Overseas Service Ribbon, as suspected before. The battle stars confirm participation in multiple campaigns overseas.
Second Ribbon (Red with White Stripes): This is indeed the Navy Good Conduct Medal, also previously identified. The silver star in the center indicates a subsequent award or achievement related to good conduct, such as a specific period of exemplary service.
Third Ribbon (Green/Yellow/Blue): This is the National Defense Service Medal. This medal is awarded for active duty service during specific periods of national emergency.
Bottom Ribbon (Red with Blue Stripes): This is the Navy or Marine Corps Expeditionary Medal. It's awarded for service in specific operations or locations outside the United States.