Complex sentence: This new role was a creation of a new strike on 17 March 1916, what would effect the war machine greatly; although the service still believed German agents was behind the unrest, it began to investigate.
Split into simpler sentences: This new role was a creation of a new strike on 17 March 1916, what would effect the war machine greatly. Although the service still believed German agents was behind the unrest, it began to investigate.