Meanwhile, the profusion of small parties and their aversion to coherent alliances left the legislature chaotic. During 1993, Yeltsin's rift with the parliamentary leadership led to the September–October 1993 constitutional crisis. The crisis climaxed on 3 October, when Yeltsin chose a radical solution to settle his dispute with parliament: he called up tanks to shell the Russian White House, blasting out his opponents. As Yeltsin was taking the unconstitutional step of dissolving the legislature, Russia came close to a serious civil conflict. Yeltsin was then free to impose the current Russian constitution with strong presidential powers, which was approved by referendum in December 1993. The cohesion of the Russian Federation was also threatened when the republic of Chechnya attempted to break away, leading to the First and Second Chechen Wars.