General Sir Charles James Napier , GCB ( August 10 , 1782 â `` August 29 , 1853 ) was a British general and Commander-in-Chief in India , famous for conquering Sindh province in present-day Pakistan . General Sir Charles James Napier , Order of the Bath ( August , 10 , 1782 â `` August 29 , 1853 ) , was a general of the British Empire and the British Army 's Commander-in-Chief in India , notable for conquering the Sindh Province in what is now Pakistan .