What did Revere, Dawes and Prescott do?

They warned the colonists that the British Redcoats were coming to destroy ammunition and weapons.

Explanation:

It is unlikely Hitler could be appeased, as Poland was the last straw and after the annexation of Czechoslovakia, Chamberlain promised that an attack on Poland means war. Hitler always wanted more as he always believed in Lebensraum (living space) for his 'pure Arayans' to live in. Meaning the land he had gotten was too little. He would have invaded France either way and most likely invade USSR as he showed true hate for them.