Seen from Paris, the Treaty of Riga had the merit of closing the Soviet-Polish war and therefore of completing the drawing of the new European borders. However, there was still no guarantee of stability in Eastern Europe. From 1918, successive French governments supported a 'strong Poland’ which could assist the completion of the strategic French aims in Europe. Both French and Polish diplomatic archives show the crux of the problem: the Treaty of Riga sowed the seeds of future conflicts with Russia (which was still considered a European power) and, moreover, the events of the early 1920s jeopardized the relationship between Poland and Lithuania. This is why French governments consistently appeared reluctant to give its guarantee to the boundaries issued from the Treaty of Riga. They also remained reluctant towards Warsaw’s regional plans.