The foreign policy of the Russian Empire covers Russian foreign relations from their origins in the policies of the Tsardom of Russia (until 1721) down to the end of the Russian Empire in 1917. Under the system tsarist autocracy, the Emperors/Empresses (at least theoretically) made all the main decisions in the Russian Empire, so a uniformity of policy and a forcefulness resulted during the long regimes of powerful leaders such as Peter the Great (r. 1682–1725) and Catherine the Great (r. 1762–1796). However, several weak tsars also reigned—such as children with a regent in control—and numerous plots and assassinations occurred. With weak rulers or rapid turnovers on the throne, unpredictability and even chaos could result.