Complex sentence: Implementation of the new scheme had disrupted the old one but had not become effective by 1914; during the crisis over the assassination of Franz Ferdinand, regiments were divided and incorporated eight conscription classes into the army, to provide for the field army and troops.
Split into simpler sentences: Implementation of the new scheme had disrupted the old one, but had not become effective by 1914. During the crisis over the assassination of Franz Ferdinand, regiments were divided and incorporated eight conscription classes into the army, to provide for the field army and troops.