Complex sentence: In 1870 she remained at the side of Empress Eugénie in Paris during the Franco-Prussian War, and later aided her escape from Paris to Great Britain by secretly sending Eugénie's jewels to London in a diplomatic bag.
Split into simpler sentences: In 1870 she remained at the side of Empress Eugénie in Paris during the Franco-Prussian War. Later she aided the Empress'escape from Paris to Great Britain by secretly sending Eugénie's jewels to London in a diplomatic bag.