The USMC contains the some of the bravest soldiers in the world. The Marines operates under the navy during war as their own “army” and use amphibious vehicles. It was first formed during 1775 with the army. Its rank badges are the same as the army but the enlisted and warrant officers have a reddened form of the badge.

 

The USCG was made before the navy, and acts like the sea patrol and enforcement, rescue, and helps the navy in shallow waters. It can also help stop and arrest drug smugglers. The Coast Guard helped in the D-Day invasion in Normandy. They use small and medium ships, rescue aircraft, and drones. Their ranks are same as the navy but the Seaman Recruit has a badge and the badges are bluer.

 

All information from militaryfactory.com.