Since 1905 Russia had been plagued by revolutionary unrest and discontent was widespread among the population. With broad support, leftist organizations waged a violent campaign against the autocracy; throughout Russia, many police officials and bureaucrats were assassinated. "Stolypin inspected rebellious areas unarmed and without bodyguards. During one of these trips, somebody dropped a bomb under his feet. There were casualties, but Stolypin survived." To respond to these attacks, Stolypin introduced a new court system of martial law, that allowed for the arrest and speedy trial of accused offenders. Over 3,000 (possibly 5,500) suspects were convicted and executed by these special courts between 1906 and 1909. In a Duma session on 17 November 1907, Kadet party member Fedor Rodichev referred to the gallows as "Stolypin's efficient black Monday necktie". As a result, Stolypin challenged Rodichev to a duel, but the Kadet party member decided to apologize for the phrase in order to avoid the duel. Nevertheless, the expression remained, as did "Stolypin car".