Water Polo match into a Dutch Canal during the 1st World War 1914-1918 (Behind the Western front) .
(During the war, the Netherlands had remained neutral, something that had been a principle of Dutch foreign politics for some time. The Dutch army was, however, mobilised to defend its own territory. Furthermore, the Netherlands had to deal with the peripheral effects of the war. Large numbers of Belgian refugees had to be taken in, in temporary camps, among other places. Unemployment rose due to the fall in international trade and the sinking (by torpedoes) of many merchant vessels. Food became scarce and rationing was introduced. In 1917 and 1918, despairing housewives plundered food stocks in Amsterdam and Rotterdam.)