The GATT negotiating round that lasted from 1986 to 1994 and led to the creation of the World Trade Organization was the Uruguay Round.
The Uruguay Round began in Punta del Este, Uruguay, in September 1986. It was the eighth and final round of multilateral trade negotiations conducted under the General Agreement on Tariffs and Trade. The talks concluded with the Marrakesh Agreement, signed in April 1994.
The negotiations expanded the multilateral trading system beyond tariffs on goods. They produced agreements covering services, intellectual property, agriculture, textiles, and dispute settlement. The Marrakesh Agreement established the WTO, which began operating on 1 January 1995.
The Doha Round, launched in 2001, came later and remains separate. The Tokyo Round ran from 1973 to 1979, while the Kennedy Round ran from 1964 to 1967.