Royal Navy during the First World War
| Royal Navy | |
|---|---|
HMS Iron Duke leads HMS Marlborough and other dreadnoughts of the Grand Fleet | |
| Service branches | Royal Marines Fleet Air Arm |
| Headquarters | Admiralty, London |
| Leadership | |
| First Lord of the Admiralty | Winston Churchill Arthur Balfour Edward Carson Eric Geddes |
| First Sea Lord | Prince Louis of Battenberg John Fisher Henry Jackson John Jellicoe |
| Personnel | |
| Active personnel | 263,200 (November 1918) |
| Reserve personnel | 129,950 (November 1918) |
The Royal Navy during the First World War entered the conflict as the world's most powerful fleet, maintaining British naval supremacy since the victory at Trafalgar in 1805. However, the war brought unprecedented challenges and setbacks for the Royal Navy. At the pivotal Battle of Jutland in 1916, the Navy suffered its first major fleet defeat since Trafalgar, shaking confidence in its unassailable dominance. The Royal Navy also faced serious difficulties countering the German U-boat threat, leading to heavy shipping losses and a critical failure to provide adequate convoys and escorts in the war’s early years. Strategic ambitions were further frustrated by the unsuccessful Dardanelles Campaign of 1915, an attempt to force open a sea route to Russia which ended in failure and heavy losses. Meanwhile, the conflict saw the advent of the airplane in naval warfare, introducing new reconnaissance and combat roles that began to reshape naval strategy and operations.