I got a question for you: The Spanish Infanteria de Marina was formed in 1537, making it the oldest, current marine force in the world. The British Royal Marines combine being both a ship-based force and also being specially trained in commando-style operations and tactics, operating in some cases separately from the rest of the Royal Navy. The Royal Marines also have their own special forces unit.

Based on this passage, who has the oldest navy in the world?
Let's think first:
To answer the question, consider the following: The Spanish Infanteria de Marina was formed in 1537, making it the oldest, current marine force in the world.
Therefore, the answer is Spanish.