ThoseDeafMutes
Member
Britain historically has a small army, a core of regulars that were shipped across the Empire to prop up native commonwealth or less professional/garrison troops. And at the onset of fighting, those regulars made up the BEF who'd later go on to shore up the other theater's later in the war.
It would have been a totally different war (and i'd happily argue a different outcome) if those men were lost at Dunkirk.
How many would be lost though? The evacuation lasted for eight-nine days, there's always going to be at least some of them making it out. More specifically - the total loss of all personnel who would be evacuated would have been of significance, but such a scenario is very unrealistic. The French were fighting to the death nearby and most of the British formations were still in tact. Had the Germans attempted to race to Dunkirk without stopping as they did for a day historically, it would not have turned out well. The lone Panzer division (Guderian's) would have run headlong into the exact formations that stopped it historically (they were already in place prior to the halt order being given), but without taking a day to rest and wait for support elements to catch up. A concerted counter attack on their vulnerable rear may have actually resulted in the loss of the division to the BEF and French 7th Army, whom outnumbered them dramatically in that area and could potentially have cut them off (not guaranteed or anything, but possible).
It's also not true that all of the British regulars were there as opposed to in other theaters or in the UK. Even if you waved a wand and got rid of many of them, new recruits had plenty of time and engagements to forge them into battle hardened soldiers over the following few years. Commonwealth and local forces held the line in North Africa for the time being - it's not likely that front would have changed radically. Long term maybe some operations need more time for new formations to build up and go slightly worse due to a smaller number (initially) of experienced regulars, but the broad picture doesn't look different, imo.