Complex sentence: The first state capitol was located in Detroit, the original capital of Michigan, and was relocated to Lansing in 1847, due to the need to develop the western portions of the state and for easy defense from British troops stationed in Windsor, Ontario.
Split into simpler sentences: The first state capitol was located in Detroit, the original capital of Michigan. The capital city was relocated to Lansing during 1847, due to the need to develop the western portions of the state and for easier defense from British troops stationed in Windsor, Ontario.