Query: A blockade of what coastline was ordered by the French government at the start of the war?
Context: When the war began, the French government ordered a blockade of the North German coasts, which the small North German navy (Norddeutsche Bundesmarine) with only five ironclads could do little to oppose. For most of the war, the three largest German ironclads were out of service with engine troubles; only the turret ship SMS Arminius was available to conduct operations.