Soviet leader Vladimir Lenin defined only three types of just war, all of which share the central trait of being revolutionary in character. In simple terms: "To the Russian workers has fallen the honor and the good fortune of being the first to start the revolution—the great and only legitimate and just war, the war of the oppressed against the oppressors.", with these two opposing categories being defined in terms of class, as is typical in the left. In that manner, Lenin shunned the more common interpretation of a defensive war as a just one—often summarized as "who fired the first shot?"—precisely because it didn't take in consideration the class factor. Which side initiated aggressions or had a grievance or any other commonly considered factor of "jus ad bellum" mattered not at all, he claimed; if one side was being oppressed by the other, the war against the oppressor would always be, by definition, a defensive war anyway. Any war lacking this duality of oppressed and oppressor was, in contradistinction, always a reactionary, unjust war, in which the oppressed effectively fight in order to protect their own oppressors: