This chapter examines over six hundred militarized interstate disputes (MIDs) in order to determine whether oil ambitions motivate militarized conflict. It provides evidence of classic oil wars, in which severe militarized interstate conflicts are driven largely by participants' desire to obtain petroleum resources. It also points out how MIDs in oil-endowed territories were either very minor or motivated by other issues. The chapter introduces four new categories of conflict: oil spats, red herrings, oil campaigns, and oil gambits. It explains that oil spats are minor confrontations driven by petroleum ambitions, such as China and Vietnam's 2014 confrontation over a drilling rig in the South China Sea. It also describes red herrings, which are not fought for oil, but instead, aggressors are motivated predominantly by aspirations to political independence or regional hegemony.