Nice to be able to be a Monday morning quarterback 75 years later.
It was a winning strategy even with all the tactical mistakes that were made.
At a TERRIBLY HIGH COST. It didn't have to be that way. Our troops were used as cannon fodder like the troops in WWI. We should have learned something over the years between the wars. Yes, we won IN SPITE of the awful tactics.
Then we put up medium tanks (M4's) designed for troop support against far superior armor so they could get slaughtered after the beach was secured. The only thing that eventually saved us was air supremacy as the Luftwaffe was gone. Little fuel, very few qualified pilots.
You seem to think everyone was playing games and sitting on their hands in between both world wars. We had reduced our military because some in DC felt WW1 had put an end to war. There were those that were convinced that every war would be fought trench ware fare. Look at the Maginot line as an example. Our tanks were no match for the Germans because some did not see the need for heavy armor.
In case you forgot we spent a portion of WW2 pretending that it was only over there and in no way affected us.
I agree with you, then we had from December 7th 1941, to June 6th 1944 to come up with better equipment and tactics to combat what we KNEW we were facing. In fact we could have copied it like the Russians did. Why didn't we?
We had the largest, and best unaffected by war industrial might in the world, and kept using crap that we had at, or near the beginning of the war. Yes, our airplane technology advanced, but that wasn't used to our advantage during D Day.
We had to ramp up production from one tank a month if even that. We had to ramp up production of planes, bombs bullets, uniforms, battleships every part of war. We had men who had previously been in the factories and ship yards volunteering. Drafts men and others were leaving to fight. We could have held off until we had better equipment but would England and Russia have still been there?
We were fighting wars on three fronts basically. We were fighting in Africa and Italy. We were fighting in the pacific. With DDay we were fighting in Europe. We lost how many ships at Pearl Harbor. We were losing cargo ships almost daily in the Atlantic. Later we lost ships almost daily in the Pacific.
We were loosing planes by the dozen in a week. Just replacing them was a major undertaking.
Considering that how long should we have held off? How many English and Russians should have died? How many more should have died in concentration camps? The Germans were continually updateding. Are you even aware how long it takes to conceptualize, draft, change over production for a change to a different type of tank? Do we stop building ships to build more and better tanks? We were supplying Russia and England with war material. How do you train people to handle new weapons? Now think about training Russians and the English.