In later years the B&O mostly abandoned the articulated compounds for simple designs like the 2-8-8-4 Yellowstone and 2-6-6-4. These too found work on the West End and some remarkably remained in service until the 1950s. The B&O, building from the success of the design, ordered a batch of slightly larger locomotives from the American Locomotive Company (Alco) about a decade later they carried an 0-8-8-0 wheel arrangement and were listed as Class LL-1. The locomotive was employed along the West End in Pennsylvania where it pulled heavy drag freights and proved quite adept in this capacity thanks to its high tractive effort. The Great Lakes served as a battle site for the French and Indian War (the North American portion of the broader Seven Years' War), the American Revolution, and the War of 1812.The Baltimore & Ohio was the first railroad to put an articulated Mallet into service with its 0-6-6-0 " Old Maude" numbered 2400. The lakes were also explored by various other explorers who established initial settlements along the lake region, trading with the Indigenous peoples. He was followed by Samuel de Champlain, who reached Lake Huron in 1615 and eventually became the first European to visit all the Great Lakes. Lawrence River while on his search for a new sea route to the Orient. The Great Lakes played a great role in the exploration and development of the North American continent. Several Indigenous peoples inhabited the Great Lakes beginning after the end of the Last Glacial Period, around 10,000 BCE. The lake islands also serve as critical habitats for various shorebirds and ducks. Ring-billed gulls, herring gulls, and terns are some of the common avian species observed in the Great Lakes. Some of the significant fish that are found here include whitefish, smelt, lake herring, lake trout, salmon, catfish, bass, white perch, and walleye, among others. Other invertebrate species like snails, worms, mayflies, caddisflies, clams, opossum shrimp, deepwater sculpins, zebra mussels, and spiny water fleas are also found in the lakes' waters. Diatoms, blue-green algae, microscopic crustaceans, copepods, cladocerans have been recorded in the waters of the Great Lakes. Over 3,500 species of flora and fauna are found in the Great Lakes basin.
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