Bismarck entered service in the summer of 1940. She was well-armed, with eight 15-inch guns as well as a powerful array of lighter weapons, while her armored protection earned her the reputation of being unsinkable. This claim was finally put to the test in May 1941, when she sortied into the Atlantic and fought the legendary battle of the Denmark Strait, destroying HMS Hood, the pride of the Royal Navy. Bismarck was now loose in the North Atlantic. However, damage sustained in the battle limited her ability to roam at will, while the Royal Navy deployed the Home Fleet to revenge the Hood. The stage was set for the greatest chase story in the history of naval warfare.