 Complete the following phrase:  Open military work and secret machinations tested his energy and patriotism equally, and after the outbreak of the Wars of Liberation in 1812, Major-General Gneisenau became Blüchers quartermaster-general. Thus began the connection between these two soldiers which has furnished military history with one of the best examples of harmonious co-operation between a commander and his chief-of-staff. With Blücher, Gneisenau served in the capture of 