Complex sentence: The Battle of Bazeilles was fought on 1 September 1870 and was considered part of the Battle of Sedan during the Franco-Prussian War, was one of the first occasions of modern urban warfare.
Split into simpler sentences: The Battle of Bazeilles was fought on 1 September 1870. It was part of the Battle of Sedan during the Franco-Prussian War, and was one of the first occurences of modern urban warfare.