In centuries past, there have been many wars fought to bring Europe under one economic and political union. The Napoleonic Empire, the Prussian Empire, the Third Reich, and even the Ottoman Empire further to the east ultimately failed to achieve this goal. Today, in many ways, Europe is engaged in another war – a war to preserve the hard-fought gains of monetary and fiscal union built over the past five decades beginning with the Treaty of Rome in 1957.

The "Europe" sculpture by Belgian artist May Claerhout, showing a woman holding up the symbol of the Euro, stands outside the European Parliament building.

The battles of this conflict, like previous European wars, are being fought across a broad theater. The Argonne, Waterloo and Normandy are among the many famous battlefields of the past. Greece, Portugal and Ireland are among the theaters of war in which European Union is currently engaged.