Complex sentence: The Secretary of State for the Colonies George Germain, 1st Viscount Sackville was ultimately responsible for British strategy during the war, although some historians argue he carried out his role effectively, other historians argue he struggled to hold genuine authority over his subordinates in the army.
Split into simpler sentences: The Secretary of State for the Colonies George Germain, 1st Viscount Sackville was ultimately responsible for British strategy during the war. Some historians argue he carried out his role effectively, while others have argued he struggled to hold genuine authority over his subordinates in the army.