original_query: What were the G3 battlecruisers?
query: What were the G3 battlecruisers?
answer: The G3 battlecruisers were a class of four planned battlecruisers for the Royal Navy, designed in response to naval expansion by the US and Japan.  Larger and faster than existing battleships, they were considered 'fast battleships' but officially designated battlecruisers due to their higher speed and lesser firepower/armor than the planned N3-class battleships.  Their construction was cancelled in 1922 due to the Washington Naval Treaty.