European Public Policy 2021: By which threaty did the EU go from a Community to a Union?

Question

By which threaty did the EU go from a Community to a Union?

Yuan92 · Accepted Answer

By the treaty of Maastricht in 1992 which entered into force in 1993.

Yuan92 · Answer

By the treaty of maastricht signed in 1992 and enterd into force in 1993

Yuan92 · Answer

The treaty of maastricht

Yuan92 · Answer

the treaty of maastricht in 1992 that entered into force in 1993

By which threaty did the EU go from a Community to a Union?