:According to WP's own entry, the Line of battle is a naval tactic or disposition, which is the term that I am familiar with. Armoured cruisers were retained by all major navies into the First World War, and some even persisted as late as the Second World War. It wasn't an instant change; battlecruisers first showed up in 1908 and were still being used as frontline warships at the Battle of Jutland, by both sides. I would say that the most misleading part of that sentence is its grammar, which I will have a go at tweaking.