USS Montana (ACR-13/CA-13), also referred to as "Armored Cruiser No. 13", later renamed Missoula and reclassified CA-13, was a armored cruiser of the United States Navy. She was built by the Newport News Drydock & Shipbuilding Co.; her keel was laid down in April 1905, she was launched in December 1906, and she was commissioned in July 1908. The final class of armored cruisers to be built for the US Navy, Montana and her sisters were armed with a main battery of four guns, and they were capable of a top speed of .
Montana spent her active duty career in the Atlantic Fleet. She made two cruises to the Mediterranean Sea to protect American citizens in the Ottoman Empire, the first in 1909 in the aftermath of the Young Turk Revolution and the second during the Balkan Wars in 1913. Montana was also involved in political unrest in Central American countries, sending landing parties ashore in Haiti and in Mexico during the Occupation of Veracruz, both in 1914.
After the United States entered World War I in April 1917, Montana was tasked with convoy escort and training ship duties. With the end of the war in November 1918 came a new task, transporting American soldiers back from the battlefields of Europe. She made six round trips to France and carried back a total of 8,800 men. Montana was then transferred to the Puget Sound Naval Yard in Washington state, where she was decommissioned and renamed Missoula. She remained in the reserve fleet until 1930, when she was stricken under the terms of the London Naval Treaty. The ship was eventually sold for scrap in 1935 and broken up.
Design
thumb|left|Line-drawing of a Tennessee-class cruiser, with mid-ship cross section
Montana was long overall and had beam of and a draft of . She displaced normally and up to at full load. The ship was propelled by two 4-cylinder, vertical triple-expansion engines, with steam provided by sixteen coal-fired Babcock & Wilcox water-tube boilers trunked into four funnels. The engines were rated at , which produced a top speed of . She had a storage capacity for up to of coal, which allowed her to steam for at a speed of . She had a crew of 914 officers and men. Originally fitted with a pair of military masts, Montana had her foremast replaced with a cage mast in 1911.
Montana was armed with a main battery of four 40-caliber Mark 3 guns in two twin gun turrets, one forward and one aft. These were supported by a secondary battery of sixteen 40-caliber Mark 8 guns mounted in casemates, eight on each broadside. For defense against torpedo boats, she carried twenty-two 50-caliber guns in single pedestal mounts either in casemates or sponsons in the hull. She also carried a variety of smaller guns, including twelve 3-pounder automatic guns and four 1-pounders. Like other contemporary armored cruisers, she was also armed with four torpedo tubes located below the waterline in her hull. Montana was protected by a combination of Krupp cemented steel and older Harvey steel. The ship's armored belt was thick and the maximum thickness of the armor deck was 3 in thick. The main battery turret faces were thick, as were the sides of the conning tower. On 8 October 1908 she put on a searchlight display as part of a fireworks display at Philadelphia. During the display her searchlights blinded the operator of Philadelphia Police Department steamer that then had a slight collision with a barge that "Visitor" was going to, to help put out a fire on board caused by malfunctioning fireworks. After a stop in Charleston, South Carolina, she continued south through the Caribbean Sea, arriving at Colón, Panama on 29 January. There, she joined the Special Service Squadron. This duty was interrupted twice; The second came in April, owing to instability in the Ottoman Empire following the Young Turk Revolution that threatened American interests. Montana departed Guantanamo Bay, Cuba, on 2 April, when she was sent to the Mediterranean to protect Americans in the region. She remained there until 23 July, when she left Gibraltar, arriving in Boston on 3 August. She thereafter returned to her normal operations patrolling the eastern coast of the United States. The ship left Argentina on 30 June and arrived back in Hampton Roads on 22 July. After resuming her normal peacetime routine for the following three months, Montana was tasked with escorting President William Howard Taft aboard Tennessee for a trip to Panama. The two ships departed Charleston on 10 November for the visit, which lasted a week. On 26 July 1911, Montana was transferred to the Atlantic Reserve Fleet and she began an overhaul at the Portsmouth Navy Yard that lasted until 11 November 1912. During the trip, which lasted until June 1913, she made stops in Beirut, İskenderun, and Mersin. After returning to the United States, the ship resumed her peacetime routine of training cruises off the American east coast, as well as cruises to Mexico, Cuba, and Haiti, over the following year. Later that year, for a few days between 28 April and early May, Montana took part in the United States occupation of Veracruz, where the ship's commander, Louis McCoy Nulton, led a landing party in the city during the occupation. Montana also carried the remains on the seventeen sailors and marines who had been killed in the fighting back to New York City, arriving on 10 May. There, the Navy held a ceremony attended by President Woodrow Wilson and Secretary of the Navy Josephus Daniels.
World War I
thumb|Montana underway in 1918 in [[dazzle camouflage]]
After the United States entered World War I on 6 April 1917, Montana initially was tasked with transporting men and materiel in the York River area, along with conducting training exercises. On 17 July, she was assigned to the Cruiser and Transport Force; she spent the majority of 1917 and 1918 escorting convoys from Hampton Roads, New York City, and Halifax, Nova Scotia to France. In early 1918, she was briefly used as a training ship for naval cadets from the United States Naval Academy in the Chesapeake Bay.
In September 1918, Montana took part in another troopship convoy to France with the battleship , the armored cruiser , and the destroyer . The convoy consisted of the transports , , , Rijndam, Wilhelmina, British steamer Ascanius. The following month she joined the battleship to escort twelve British merchant ships bound for Liverpool. Following the Allied victory in November 1918, Montana was sent to France to begin the process of transporting American soldiers back from Europe. By July 1919, she had made six round trips between France and the United States, carrying a total of some 8,800 American soldiers.