Through a strict, non-confrontational policy in pursuing independence, Estonia managed to avoid the violence which Latvia and Lithuania incurred in the bloody January 1991 crackdowns and in the border customs-post guard murders that summer. During the August coup in the U.S.S.R., Estonia was able to maintain constant operation and control of its telecommunications facilities, thereby offering the West a clear view into the latest coup developments and serving as a conduit for swift Western support and recognition of Estonia's redeclaration of independence on August 20, 1991. August 20 remains a national holiday in Estonia because of this. Following Europe's lead, the United States formally reestablished diplomatic relations with Estonia on September 2, and the U.S.S.R. Supreme Soviet offered recognition on September 6.

After more than 3 years of negotiations, on August 31, 1994, the armed forces of the Russian Federation withdrew from Estonia. Since fully regaining independence Estonia has had 12 governments with 8 prime ministers: Mart Laar, Andres Tarand, Tiit Vähi, Mart Siimann, Siim Kallas, Juhan Parts, and Andrus Ansip. The PMs of the interim government (1990–1992) were Edgar Savisaar and Tiit Vähi.

Since the last Russian troops left in 1994, Estonia has been free to promote economic and political ties with Western Europe. Estonia opened accession negotiations with the European Union in 1998 and joined in 2004, shortly after becoming a member of the NATO.

Source http://en.wikipedia.org/wiki/History_of_Estonia