Ottoman Empire in the nineteenth century, experienced a crisis.
Description of events taking place in the year 1917 Germany looked for new methods of warfare, which would enable them to take the initiative. Their economists calculated, inter alia, that the resources to cover the British Isles after about half a year. When German submarines month British vessels with a total carrying capacity of 600 thousand RTD, the United Kingdom after 5 months would be forced to capitulate. Germany had to adopt new tactics action submarines, U-boot. Not submerged underwater when the vessel Lodz, and then check the load carried by it and its documentation. If the unit ran into an enemy port or carried supplies for the opponents, it was necessary to order the crew to leave the ship, and then you can drown. These actions were in accordance with international law, but the German commander thought to be erroneous. Emergence ship meant ruin his biggest strategic advantages - secret activities. Disclose on their position and become easy targets. Therefore, 1 February 1917 Germany began unrestricted war years underwater, or dumping without warning to all ships in the Atlantic.