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Continental congress
It was formed by delegates from the thirteen colonies and operated as the governing body during the American Revolution.
The communist regime of USSR led by Gorbachev was no longer willing to intervene in the eastern countries, in a time that the countries were facing increasing pressure for freedom and liberties. The success of some early uprising in countries like Hungary endeared other countries to follow suit.
They served both sides, sometimes it just depended on whose land was where.
Under the Articles of Confederation, Congress was unable to improve the economy because it did not have the power to tax the states. This meant it was practically impossible for the United States to repay its war debts.