Complex sentence: After the end of the wars against Napoleonic France and the United States the British Army disbanded many units for the sake of economy, and the 102nd Regiment was renumbered as the 100th Regiment of Foot in 1816.
Split into simpler sentences: After the end of the wars against Napoleonic France and the United States, the British Army disbanded many units for the sake of economy. The 102nd Regiment was renumbered as the 100th Regiment of Foot in 1816.