Allies lying minefields in the Mediterranean according to the Kriegsnachrichten No. 60 of the Chef des Admiralstabes der Marine dated 28 June 1918

An item referring to a reliable agent reported that at Toulon, France end May considerable amounts of mines were provided. Shipping lanes in the Mediterranean were to be protected by minefields.

Source

Bundesarchiv RM-40-622

Lisbon, Portugal protected by mine barrage and torpedo boats according to the Kriegsnachrichten of the Chef des Admiralstabes der Marine dated Berlin 5 August 1917

An item reported that according to a cargo steam ship dated 6 July for Lisbon, Portugal a mine barrage was laid with constant two patrouilling torpedo boats.

Source

Bundesarchiv RM-40-622