In World War II, German submarines were called U-boats. They sank many Allied transports as well as many Allied freighters. And, although the Allies worked on breaking the U-boat radio code, they weren’t successful. However, in 1942, British commandos captured a U-boat, which after being wrecked, and abandoned, the commandos got a German code machine from it, which was called an Enigma machine. Afterward, The Allies broke the Enigma code, and now the Allies were able to locate German U-boats; consequently, many of them were destroyed.
Conjunctions are words that join other words, phrases or sentences together so there can be a smoother transition from one idea or word to the other. There are three types: Coordinating conjunctions that link equal parts of a sentence (and, nor, so, as well as), Subordinating Conjunctions that link a dependent clause to an independent clause (because, since, after) and Correlative Conjunctions that are pairs of conjunctions that join together words or phrases with equal importance within a sentence (either/or, such/that, not only/but also).