Complex sentence: In the 1810s, William Henry Harrison used the fort as one base for his attacks against Native Americans during what is sometimes called Tecumseh's War and it played a role in the War of 1812 as well.
Split into simpler sentences: In the 1810s, William Henry Harrison used it as one base for his attacks against Native Americans during what is sometimes called Tecumseh's War. The fort played a role in the War of 1812 as well.