The Soviets did not trust the British or the French to honour a collective security agreement, because they had already failed to react against the Nationalists during the Spanish Civil War and protect Czechoslovakia from dismemberment.
Sovjeti nisu vjerovali Britancima i Francuzima u slučaju kolektivnog sigurnosnog sporazuma, pošto isti nisu djelovali protiv Nacionalista tijekom Španjolskog građanskog rata, niti zaštitili Čehoslovačku kada ju je napala Njemačka.