[Ingsoc]

It's the infamous "Commisar Order" issued by Hitler and several generals, it's praclitly gave permission to any German soldier to shoot at any civilian/POW.

Here GFM Erich von Manstein version to the command:

This struggle is not being carried on against the Soviet Armed Forces alone in the established form laid down by European rules of warfare.
Behind the front too, the fighting continues. Partisan snipers dressed as civilians attack single soldiers and small units and try to disrupt our supplies by sabotage with mines and infernal machines. Bolshevists left behind keep the population freed from Bolshevism in a state of unrest by means of terror and attempt thereby to sabotage the political and economic pacification of the country. Harvests and factories are destroyed and the city population in particular is thereby ruthlessly delivered to starvation. Jewry is the middleman between the enemy in the rear and the remains of the Red Army and the Red leadership still fighting. More strongly than in Europe they hold all key positions of political leadership and administration, of trade and crafts and constitutes a cell for all unrest and possible uprisings. The Jewish Bolshevik system must be wiped out once and for all and should never again be allowed to invade our European living space. The German soldier has therefore not only the task of crushing the military potential of this system. He comes also as the bearer of a racial concept and as the avenger of all the cruelties which have been perpetrated on him and on the German people." ... "The soldier must appreciate the necessity for the harsh punishment of Jewry, the spiritual bearer of the Bolshevik terror. This is also necessary in order to nip in the bud all uprisings which are mostly plotted by Jews."