Chapter 9, “Home Army on the Offensive: Violence in 1943-1944,” dissects mature intelligentsia military resistance. As the tide of war turned and the Germans endured their first battlefield defeats against the Soviet Union, the consolidated Home Army grew aggressive. Its most effective move was a 1943 assassination campaign targeting Wehrmacht officers, Nazi police, and German administration personnel called Operation Heads. Heads intimidated the Germans and shifted occupation policy. The Home Army’s perceived success and the advance of the Eastern Front toward Warsaw in 1944 convinced underground military leaders that they were facing their last opportunity to launch a city-wide insurrection. Their rebellion, now known as the Warsaw Uprising, failed. Remaining German personnel in the city were reinforced and crushed the insurrection, slaughtered civilians, and destroyed the city. This chapter argues that military conspiracy, like Catholic resistance, had its successes but was ultimately dependent on the international situation and could not secure the practical support of the Grand Alliance in the face of both German and Soviet opposition.