was subsequently ratified by the united Federal Republic of Germany. Implementation Russian withdrawal from Germany After the Soviet Union dissolved itself in December 1991, the command unit of the Soviet Group of Soviet Forces in Germany devolved to the Russian Federation. The German government subsequently recognized the Russian Federation's claim to be the successor state of the Soviet Union, including the right to maintain troops in Germany until the end of 1994. However, with post-Soviet Russia facing severe economic hardship, President Boris Yeltsin ordered Russian troop deployment in Germany to be reduced to levels significantly below those permitted in the Treaty. The last Russian troops left Germany at the end of August 1994, four months before the treaty deadline. Bundeswehr after the treaty In the first decade of the 21st century, the Bundeswehr underwent a gradual transformation to a fully professional force. By 2011, the year Germany voluntarily suspended conscription, the Bundeswehr had retained fewer than 250,000 active duty personnel – barely two thirds of the country's treaty limit of 370,000. Later developments Russia and the Western countries signed in 1990 the Treaty on Conventional Armed Forces in Europe and in 1991 the Energy Charter Treaty, establishing a multilateral framework for cross-border cooperation in the energy industry, principally the fossil fuel industry; Russia postponed ratification of the latter treaty, linking it to the adoption of the Energy Charter Treaty Transit Protocol. In 1997, NATO and Russia signed the Russia–NATO Founding Act, which stated that each country had a sovereign right to seek alliances. In the same year, the Budapest Memorandum was signed where Russia, the United Kingdom, and the United States made security assurances to Belarus, Kazakhstan, and Ukraine, in return for handing over by these three countries of their post-Soviet nuclear arsenal. NATO ended up expanding to fourteen Eastern countries (apart from the GDR in 1990): Czech Republic, Hungary, and Poland in 1999; Bulgaria, Estonia, Latvia, Lithuania, Romania, Slovakia, and Slovenia in 2004; Albania and Croatia in 2009; Montenegro in 2017; and North Macedonia in 2020, four of them on the border with Russia. The Russia–NATO relations started to deteriorate rapidly following the Ukrainian Orange Revolution in 2004–2005. In December 2006, Russia indicated that the ratification of the Energy Charter Treaty was unlikely due to the provisions requiring third-party access to Russia's pipelines. Russia suspended in 2007 its participation in the Treaty on Conventional Armed Forces in Europe. In