One of the largest legal proceedings in German history is due to start on Monday with the first of three trials of a group of far-right conspiracists who planned to violently overthrow the country’s parliament. So sprawling is the network, so extensive their plans, that for a mixture of logistical and security reasons, the 27 people due in the dock have been split into three separate groups. On Monday a group of nine, identified as the “military wing” behind the group ringleader, the self-proclaimed Heinrich XIII, Prince Reuss, 72, will be the first to go on trial in the southern...