Which 20th century battleship featured artillery with a specially reinforced barrel and steam turbine propulsion?
Built-up gun A built-up gun is artillery with a specially reinforced barrel. An inner tube of metal stretches within its elastic limit under the pressure of confined powder gases to transmit stress to outer cylinders that are under tension. Concentric metal cylinders or wire windings are assembled to minimize the weight required to resist the pressure of powder gases pushing a projectile out of the barrel. Built-up construction was the norm for guns mounted aboard 20th century Dreadnoughts and contemporary railway guns, coastal artillery, and siege guns through World War II.
French battleship Provence Provence was a battleship of the French Navy built in the 1910s, named in honor of the French region of Provence. She was a member of the "Bretagne" class, alongside her two sister ships, "Bretagne" and "Lorraine". "Provence" was laid down in May 1912 at the Arsenal de Lorient, launched in April 1913, and commissioned into the fleet in March 1916, after the outbreak of World War I. She was armed with a main battery of ten 340 mm guns and had a top speed of 20 kn .