Complex sentence: Liebknecht was arrested and sent to the eastern front during World War I despite his immunity as a member of parliament; refusing to fight, he served burying the dead, and due to his rapidly deteriorating health was allowed to return to Germany in October 1915.
Split into simpler sentences: Liebknecht was arrested and sent to the eastern front during World War I despite his immunity as a member of parliament. Refusing to fight, he served burying the dead, and due to his rapidly deteriorating health was allowed to return to Germany in October 1915.