Complex sentence: The town of Buffalo was sparsely populated when the church was organized on February 2,1812; however having survived the War of 1812, the town of Buffalo was rebuilt and rapidly grew with the completion of the Erie Canal in 1825.
Split into simpler sentences: The town of Buffalo was sparsely populated when the church was organized on February 2,1812. However, having survived the War of 1812, the town of Buffalo was rebuilt and rapidly grew with the completion of the Erie Canal in 1825.