Serving as German nationals in the British forces was particularly dangerous, since, in case of taken captive, with a high probability they would have been executed as traitors by the Germans. The number of German-born Jews joining the British forces was exceptionally high; by the end of the war, one in seven Jewish refugees from Germany had joined the British Army. Their profound knowledge of the German language and customs proved useful. Many of them served in the administration of the British occupation army in Germany and Austria after the war.