Montgomery was shot through the body by a German sniper during WWI. He was not expected to live but after a year was well enough to rejoin his outfit.
Most would have not done so. He had a lot of character. My Father was a combat veteran of WWII and really like Montgomery.
After the disaster at Gallipoli, Churchill resigned and joined the Royal Scots Fusiliers...
http://scottishmilitarydisasters.com/index.php/titles-sp-26803/66-churchill-in-the-trenches
Montgomerys problem was that he took himself much too seriously.
If the Germans had been able to resupply Rommel in North Africa he would have kicked Monty’s butt and kept it kicked.
Due to German supply problems Monty was able to wear the Afrika Corp down to nothing.
Any time Montgomery met resistance he slowed down. Half of the German army was able to escape through the Falaise gap because Monty drug his feet.
Montgomery had a poor attitude towards American troops throughout the war.