Translate the following English sentence to French:
"This demonstrates in retrospect that the concessions made to Turkey in Helsinki were perhaps premature and that the strategy towards this country, which is so important to western security, needs to be reviewed."
Avec le recul, cela montre que la concession faite à la Turquie lors du sommet d' Helsinki était prématurée et que la stratégie vis-à-vis de ce pays si important pour la sécurité occidentale devrait être repensée.