The Visegrad Group, also called the Visegrad Four, or V4 is an alliance of four Central European states – Czech Republic, Hungary, Poland and Slovakia – for the purposes of furthering their European integration, as well as for advancing military, economic and energy cooperation with one another.[1] The group used to be occasionally referred to as the Visegrád Triangle, due to the fact that it was originally an alliance of three states – the term has not been valid since 1993, but does continue to appear sometimes.