The plot, part of Operation Valkyrie, involved Claus von Stauffenberg planting a bomb in the conference room at Wolf's Lair at Rastenburg. Areas placed under German administration included the Protectorate of Bohemia and Moravia, Reichskommissariat Ostland (encompassing the Baltic states and Belarus and Reichskommissariat Ukraine. By December 1944, 750,000 Soviet POWs were working, including in German armaments factories (in violation of the Hague and Geneva conventions mines, and farms. The Nazi government declared a "Day of National Labor" for May Day 1933, and invited many trade union delegates to Berlin for celebrations. The Nazis opposed the feminist movement, claiming that it was the creation of Jewish intellectuals, instead advocating a patriarchal society in which the German woman would recognise that her "world is her husband, her family, her children, and her home". Honouring their treaty obligations, Britain and France declared war on Germany two days later. Several Catholic leaders were targeted in the 1934 Night of the Long Knives assassinations. "Health Care Systems In Transition: Germany" (PDF).