In the upper reaches of the Rufiji River delta, in what is now Tanzania, lie the rusting remains of the Imperial German cruiser Konigsberg and her attendant fuelling collier Somali, both destroyed by gunfire from Royal Navy warships during the early months of the First World War. The outbreak of the First World War saw Konigsberg assume its new role of surface raider. This lasted only a few weeks due to a combination of coal shortages and mechanical defects, which forced her to seek shelter for repair in the muddy backwaters of the Rufiji Delta. In her most major foray, she engaged and destroyed the British cruiser H.M.S. Pegasus at Zanzibar on 20 September 1914, and her captain struck the colours to avoid further bloodshed. This volume is based entirely on original documents and first hand material from actual participants.