From Julian Jackson´s Fall of France (2003)

While the French awaited the British response regarding a possible approach towards Italy,
on 27th May 1940 Daladier, now foreign minister, drafted a telegram offering extensive territorial concessions to Italy : In French Somaliland, on the frontier with Libya, and even possibly in Tunisia. Reynaud insisted nothing should be done without consulting the British. The British answer was unambigiousffering territorial concessions to Mussolini would only whet his appetite, would be disastrous for allied public opinion, and must be avoided at all costs.

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Like one French commentator put it:

"You can´t attempt a Munich after a Sedan!"

Italy entered the war on 10th June.

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