What was the purpose of the 1999 Union State treaty between Belarus and Russia?

The 1999 Union State Foundation Treaty was established to create a politically integrated confederation between Belarus and Russia. The primary objectives of this partnership included the formation of a common currency and the development of a unified political and economic structure.12

While the treaty aimed to formalize a deep level of integration, the precise nature of the partnership remained unclear well into the 21st century. Throughout the process, the two nations navigated various disputes regarding the union's impact on defense and natural resources, even as they maintained their shared goal of monetary unification.123