​​The US 1st Infantry Division liberated Eupen on 11 September 1944. It then crossed the Siegfried line and attacked the city of Aachen, Germany, which surrendered on 21 October 1944. ‘Big Red One’ was later stationed in Büllingen and participated in the Battle of the Bulge from December 1944.

The memorial situated in the centre of Eupen commemorates the liberation of the city. It was inaugurated on 2 June 1984 in the presence of veterans and active soldiers of the US 1st Division, which was then based in Göppingen, Germany. The commemoration was organised by a group of Resistance fighters from Eupen, who had been part of 'Service D of the American Legion'. Among them was Mathias Moeris, who unveiled the memorial. His grave can be located in the cemetery of honour of the city.

The monument is significantly composed of stones from the USA, Normandy and the Ardennes. Its inscription reads: 

​America Square 

​Monument 

​in memory of 

​the American 

​First Infantry Division 

​1944 

​S.D. American Legion 

​ 

​Another stone below depicts a shoulder patch of the 1st Infantry Division surrounded by a US and a Belgian Flag. The inscription below reads:

​Presented 2 June 1984 

​in honor of the friendship 

​between the soldiers of the 

​United States Army’s 

​1st Infantry Division and the 

​CITY OF EUPEN 

​ 

​In the lower part of the city, you can find a so called 'Demarcation Stone'. These 26 stones show where the German Ardennes Offensive was stopped. They can be found between Eupen and Bastogne and were installed by the 'Touring Club de la Belgique' between 8 May 1949 and 1953.