linguistic:translation, linguistic:paraphrasing
Personality

Montgomery was notorious for his lack of tact and diplomacy. Even his "patron", the Chief of the Imperial General Staff, General Sir Alan Brooke, frequently mentions it in his war diaries: "he is liable to commit untold errors in lack of tact" and "I had to haul him over the coals for his usual lack of tact and egotistical outlook which prevented him from appreciating other people's feelings".

One incident that illustrated this occurred during the North African campaign when Montgomery bet Walter Bedell Smith that he could capture Sfax by the middle of April 1943. Smith jokingly replied that if Montgomery could do it he would give him a Flying Fortress complete with crew. Smith promptly forgot all about it, but Montgomery did not, and when Sfax was taken on 10 April he sent a message to Smith "claiming his winnings". Smith tried to laugh it off, but Montgomery was having none of it and insisted on his aircraft. It got as high as Eisenhower who, with his renowned skill in diplomacy, ensured Montgomery did get his Flying Fortress, though at a great cost in ill feeling.

Antony Beevor, in discussing Montgomery's counterproductive lack of tact in the final months of the war, described him as "insufferable". Beevor says that in January 1945 Montgomery had tried to claim far too much credit for the British (and for himself) in defeating the German counter-attack in the Ardennes in December 1944. This "crass and unpleasant blunder" helped make it impossible for Churchill and Alan Brooke to persuade Eisenhower of the need for an immediate thrust—to be led by Montgomery—through Germany to Berlin. Eisenhower did not accept the viability of the "dagger thrust" approach, it had already been agreed that Berlin would fall into the future Soviet occupation zone, and he was not willing to accept heavy casualties for no gain, so Eisenhower disregarded the British suggestions and continued with his conservative broad front strategy, and the Red Army reached Berlin well ahead of the Western Allies.

In August 1945, while Brooke, Sir Andrew Cunningham and Sir Charles Portal were discussing their possible successors as "Chiefs of Staff", they concluded that Montgomery would be very efficient as CIGS from the Army's point of view but that he was also very unpopular with a large proportion of the Army. Despite this, Cunningham and Portal were strongly in favour of Montgomery succeeding Brooke after his retirement. Churchill, by all accounts a faithful friend, is quoted as saying of Montgomery, "In defeat, unbeatable; in victory, unbearable."

Montgomery suffered from "an overbearing conceit and an uncontrollable urge for self-promotion." General Hastings Ismay, who was at the time Winston Churchill's chief staff officer and trusted military adviser, once stated of Montgomery: "I have come to the conclusion that his love of publicity is a disease, like alcoholism or taking drugs, and that it sends him equally mad."