After Germany attacked the Soviet Union, Weinert sided with the Soviets and began creating propaganda to encourage soldiers in the Wehrmacht to abandon their positions using methods such as poems printed on handbills that were thrown off behind the German lines as well as making pleas to them via the radio and shouting slogans from the rubble of Stalingrad. In 1943 he was selected as the president of the National Committee for a Free Germany. Once again the time spent on the front lines found literary expression. Weinert published his war diary under the title 'Remember Stalingrad' in 1943. Two short stories – 'Death for the Fatherland' and 'Expediency' – came out in 1942. A collection of leaflet poems written during the war came out in 1944 as 'Against the Real Enemy'. In 1947, he also published 'Chapter Two of World History: Poems About the Land of Socialism', an anthology of poems about the Soviet Union.