A year ago we had undertaken no specific commitments on the Continent of Europe, beyond those which had then existed. ... To-day we are bound by new agreements for mutual defence with Poland and Turkey; we have guaranteed assistance to Greece and Rumania against aggression. ... We know that, if the security and independence of other countries are to disappear, our own security and our own independence will be gravely threatened. We know that if international law and order is to be preserved, we must be prepared to fight in its defence.