And the dominant thought in Chamberlain's mind was the memory of this the First World War.
The bloodiest war in British history.
And the worst killing fields were here,in the valley of the River Somme.
On 1st July 1916,the first day of the Battle of the Somme,nearly 20,000 British soldiers lost their lives,more than on any other single day in the history of the British Army.
"Surely," thought Chamberlain, "no leader of a major European state "wanted something like this to happen again."
But British leaders already had an idea of Hitler's true character,because Lord Halifax had met Hitler the year before,in November 1937, at Berchtesgaden.
During the meeting, Hitler had said the British could solve any problems they had in India by shooting the Indian leader Mahatma Gandhi.
And, if that didn't work,they should shoot a dozen members of his Congress party,and if there were still problems, shoot 200 more and so on until order was established.
Lord Halifax was not impressed.
He certainly didn't succumb to Hitler's charisma.