The collapse of the Soviet Union and the breakup of Yugoslavia in the nineteen nineties challenged NATO's traditional position as a defensive alliance.

VOA: special.2009.04.04

Non-Romans and poor people may have seen the Pax Romana as more oppressive than a liberation, just like people saw the Pax Americana that way, after the collapse of the Soviet Union and before the beginning of the Iraq War.

非罗马人和穷人可能认为罗马和平,是压制，而不是自由，跟苏联解体后，伊拉克战争前,人们所谓的美式和平是一个道理。

耶鲁公开课 - 新约课程节选

The report says Russian science has suffered from drastic budget cuts since the collapse of the Soviet Union in 1991.

VOA: standard.2010.02.03

Since the collapse of the Soviet Union in 1991, and central Europe have become NATO members, almost doubling the alliance's number of countries from 15 to 28.

VOA: standard.2009.09.04

As many as 100,000 people may have died in the two wars between Russia and Chechnya since the collapse of the Soviet Union, but exact figures are not known.

VOA: standard.2009.03.26

The counterterrorism operation in Chechnya was instituted in 1999, when Russia sent troops for the second time since the collapse of the Soviet Union to put down a local separatist movement.

VOA: standard.2009.04.16