Was HMS Dreadnought actually used as a warship, or did she merely begin a new era?
Short answerShe served actively as a flagship in the Channel, but the German fleet avoided the theater she guarded, so she performed an important deterrent role without receiving a Jutland-style battle.
NotesDreadnought operated with the Channel force and covered a route of great importance to Britain. The High Seas Fleet might force its way into the Channel, but doing so would inflict damage and consume time while the Grand Fleet closed the exit behind it. A brief disruption would therefore risk the destruction of the German fleet on its return journey. The enemy's decision not to challenge that position made Dreadnought appear inactive even though her presence helped make the operation unattractive.