Munich 1938 should have served as an impetus for a real European Defence community

If all roads lead to Munich 1938, then our foreign policy options are restricted to belligerence or betrayal. In the absence of American muscle power, shouldn’t the EU, explore the fine art of diplomacy? Neo-Conservatism is an ideology that adheres firmly to the view that military might-not diplomacy or negotiations must achieve foreign policy goals. But is Neo-conservatism, allied with Neo-Liberalism today, in foreign policy prudent for the EU that has virtually no military might apart from NATO which is heavily if not entirely dependant on the US?