The EU enlargement was a phased process, but there are large differences between the past enlargements and the one occurred in 2004 and that forecasted for 2007. The largest difference refers to the relationships that previously existed between the European Union and the recently acceded and the candidate countries, in the sense that to the last acceded countries and to the next acceding ones financial and technical assistance was provided previous to accession. The limits of integration of the EU are politically unaffordable, in other words, ‘the locomotive of European Integration’ has passed the point of no return and there is no way back. There may be conflicting economic views about the wisdom of European Integration, or a continuing debate over the preservation by certain states of an ideal of national sovereignty, a tension between market Europe and social Europe, but yet despite of all this ‘... there appears to be an overall commitment to the process of integration in Europe for a variety of reasons, backed up perhaps by the ‘shadow of war’ factor which served as the original stimulus, so that whatever the tensions and differences which exist, the ‘journey to an unknown destination’ continues.