The June 2021 edition of the IRMO Brief, authored by Ivan Iliev, deals with the Visegrád Group which in 2021 marks 30 years since its establishment. The four countries which form the V4 – the Czech Republic, Hungary, Poland and Slovakia – have since 1991 achieved a high level of political, economic and social development. After joining NATO in 1999 and 2004, all of the V4 countries have joined the EU in the historic fifth wave of EU enlargement to Central and Eastern Europe. Membership in the EU has significantly boosted the economies of the V4 countries, and the legacy of the communist rule until 1991 has been overcome. However, the Visegrád Group is not synchronized in many actions within the EU as a single block. Czechia and Slovakia are more in line with EU polices, while Hungary and Poland often find themselves at loggerheads with Brussels. The author also analyses how V4 countries could enhance their cooperation and strengthen their common position within the EU.