Illinois-class battleship

USS Illinois, the lead ship of the class
Class overview
Operators:	United States
Preceded by:	Kearsarge class
Succeeded by:	Maine class
Completed:	3
Retired:	3
Preserved:	0
General characteristics
Class and type:	Illinois-class battleship
Displacement:	Full load: 12,250 long tons (12,450 t)
Length:	375 ft 4 in (114.40 m)
Beam:	72 ft 3 in (22.02 m)
Draft:	23 ft 6 in (7.16 m)
Installed power:	8 fire-tube boilers
Propulsion:	2 shaft triple expansion engines 10,000 ihp (7,500 kW)
Speed:	16 knots (30 km/h; 18 mph)
Crew:	536
Armament:	4 × 13 in (330 mm)/35 caliber guns 14 × 6 in (152 mm)/40 caliber guns 16 × 6-pounder guns (57 mm (2.2 in)) 6 × 1-pounder guns (37 mm (1.5 in)) 4 × 18 in (460 mm) torpedo tubes
Armor:	Belt: 4 to 16.5 in (100 to 420 mm) Turrets: 14 in (360 mm) Barbettes: 15 in (380 mm) Casemates: 6 in (150 mm) Conning tower: 10 in (250 mm)

The Illinois class was a group of three pre-dreadnought battleships of the United States Navy commissioned at the beginning of the 20th century. The three ships, Illinois, Alabama, and Wisconsin, were built between 1896 and 1901. They were transitional ships; they incorporated advances over preceding designs, including the first modern gun turrets for the main battery, and new rapid-firing secondary guns, but they were also the last American battleships to feature dated technologies like fire-tube boilers and Harvey armor. They were armed with a main battery of four 13-inch (330 mm) guns in two twin turrets, supported by a secondary battery of fourteen 6 in (150 mm) guns. The ships had a designed speed of 16 knots (30 km/h; 18 mph), though they exceeded that speed by a significant margin.

The three ships served in a variety of roles and locations throughout their career. Illinois served with the North Atlantic Squadron and the European Squadron early in her career, while Wisconsin served as the flagship of the Pacific Fleet and then in the Asiatic Fleet. Illinois and Alabama started the cruise of the Great White Fleet in December 1907 from the east coast of the United States, though by the time they had rounded South America and stopped in California, Alabama was forced to leave the fleet due to machinery problems. Wisconsin joined the fleet there and continued on with it to the conclusion of its tour in February 1909. All three ships were modernized in 1909 and served in the Atlantic Fleet for a short time.