These changes Change doubled Cause_change_of_position_on_a_scale the frontage of the invasion Attack and necessitated Causation a month-long delay Change_event_time so that additional landing Self_motion craft and personnel could be assembled Come_together in England .

The failure Earnings_and_losses of the Axis forces to decisively engage the Partisans during these operations necessitated Causation a further major offensive , Operation Trio , in the area immediately south of where Operations Southeast Croatia and Ozren had taken place Process_start .

The collapse Earnings_and_losses of Italy necessitated German troops replacing Change_of_leadership the Italians in Italy and to a lesser Cause_change_of_position_on_a_scale extent the Balkans , resulting in Causation one fifth of the entire German army being diverted Removing from the east to southern Europe , a proportion that would remain until near the end Process_end of the war Hostile_encounter .