The Spring 1945 offensive in Italy , codenamed Operation Grapeshot , was the Allied attack by Fifth United States Army , British 8th Army and Brazilian Expeditionary Force into the Lombardy Plain which started on 6 April 1945 and ended on 2 May with the surrender of German forces in Italy .
It started on 6 April 1945 and ended on 2 May with the surrender of German forces in Italy .