France–Germany relations of the further integration of the EU. They are sometimes described as the "twin engine" or "core countries" pushing for moves. A tram straddling the Franco-German border, across the river Rhine from Strasbourg to Kehl, was inaugurated on the 28th of April 2017 symbolising the strength of relation between the two countries. Both France and Germany track their history back to the time of Charlemagne, whose vast empire included most of the area of both modern-day France and Germany – as well as the Netherlands, Belgium, Luxembourg, Switzerland, Austria, Slovenia, and northern Italy. The death of Charlemagne's son Louis the
History of Belgium the Thirty Years' War (1618–1648), Belgium has often been called the "battlefield of Europe" or the "cockpit of Europe". It is also remarkable as a European nation which contains, and is divided by, a language boundary between Latin-derived French and Germanic Dutch. Belgium's modern shape can be partly traced back at least as far as the "Seventeen Provinces" within the Burgundian Netherlands. These lands straddled the ancient boundary of the Scheldt that had divided medieval France and Germany, but they were brought together under the House of Valois-Burgundy, and unified into one autonomous territory by their heir Charles V, Holy