The region covering today's Tajikistan was part the of Persian empires for much of its history. This region has been an important place for flourishing Persian culture and language. In recent history, Tajikistan has experienced three changes in government and a five-year civil war since it gained independence from the USSR in 1991. A peace agreement among rival factions was signed in 1997 and implemented in 2000. The central government's less than total control over some areas of the country has forced it to compromise and forge alliances among factions. Attention by the international community in the wake of the war in Afghanistan has brought increased economic development assistance, which could create jobs and increase stability in the long term. Tajikistan is in the early stages of seeking World Trade Organization membership and has joined NATO's Partnership for Peace.