I do not grudge our loyal, brave people... the natural, spontaneous outburst of joy and relief when they learned that the hard ordeal would no longer be required of them at the moment; but they should know the truth. They should know that there has been gross neglect and deficiency in our defences; they should know that we have sustained a defeat without a war, the consequences of which will travel far with us along our road; they should know that we have passed an awful milestone in our history... and that the terrible words have for the time being been pronounced against the Western democracies: "Thou art weighed in the balance and found wanting." And do not suppose that this is the end. This is only the beginning of the reckoning. This is only the first sip, the first foretaste of a bitter cup... [Winston Churchill, speaking on October 5, 1938 in the House of Commons]
You were given the choice between war and dishonour. You chose dishonour, and you will have war. [Churchill, 1938]The text of today's historic understanding, the so-called Joint Comprehensive Plan of Action, is here.