USS Louisiana (BB-19) was an American battleship (pre-dreadnought), the keel of which was laid in February 1903, launched in August 1904, and was completely completed in June 1906. The total length of the ship at the time of launching was 139 m, width 23.4 m, with a full displacement of about 17,900 tons. In turn, the maximum speed did not exceed 18-19 knots. The unit was armed with: 4 305 mm guns, 8 203 mm guns and 12 178 mm guns.
USS Louisiana (BB-19) was the second of six Connecticut-class battleships. Units of this type had very similar armament to the Virginia type units, with the caliber of medium artillery increased (from 152 mm to 178 mm), as well as slightly better armor (especially on the last four of this class!). Generally speaking, the Connecticut class ships are probably the best pre-dredged ships in the US Navy, and have withstood comparisons with other similar ships of the British, French, and German fleets. Of course, as with all pre-dreadnoughts, their combat value was radically undermined when the battleship HMS Dreadnought was introduced in 1906. USS Louisiana (BB-19), after entering service, operated mainly in the Atlantic, with particular emphasis on the Caribbean Sea, and in the period 1907-1909 it was part of the so-called The Great White Fleet, which circumnavigated the globe, thus demonstrating the growing importance of the USA in world politics. During World War I, the battleship was primarily a training ship and occasionally (in 1917-1918) performed other tasks, for example convoy or patrol. However, after its end, the USS Louisiana (BB-19) took part in the transport of American troops from Europe to the USA. In 1923, the unit was sent for scrap under the provisions of the Washington Treaty of the previous year.