The Royal Navy first came into operation in the early 16th century but the British (or Royal Army) was set up in 1707. So therefore the Royal Navy is the oldest. Hope this help you!
Addendum:
The UK does not have a Royal Army. The navy and the air force are Royal, but the army is just the British Army.
We do have various regiments and corps that are Royal though.
The Royal Marines are part of the Royal Navy and nothing to do with the Army.
The Royal Navy is known as the senior service over the British Army and Royal Air Force because it has been in existence longer.
He was never in the army, as a young person he was in the Merchant Navy and later in the Royal Navy
No, the queen isn't allowed to have an army, so therefore it cannot have royal in the name, but technically it can own regiments within the army. On a further note, the queen is allowed to have an airforce and a navy, so the word royal is included in the names of those brances; Royal Canadian Air Force and the Royal Canadian Navy.
It isn't. The Royal Air Force is an idependent force like the Royal Navy and the Army. The navy and army have their own individual air arms, the Fleet Air Arm and the Army Air Corps but each has individual roles.
Gieves and Hawkes, English tailors to the Royal Army, Royal Navy and RAF
None, to my knowledge..........................
}Royal Australian Navy }Australian Army }Royal Australian Air Force
Yes, the Royal Navy is also referred to as the British Royal Navy or the Royal British Navy.
It has the Royal Navy, The Royal Air Force (or RAF) and a normal ground-based army.
The Prince Charles, Prince of Wales was not in the Army, he was however a Captain of the Royal Navy, he was a Naval aviator
George Washington was NEVER a member of the British Royal Navy, but he did fight in the British Army during the French and Indian War