Well it's hard to answer but at the height of WW2 the U.S war machine was churning out one waplane every 5 minutes.
Browning .303
Yak 3,perhaps
car manufacture was suspended during war
No
There was no single leader during WW1. Each country had their own leader.
No one had to manufacture the medals during the Vietnam War. There was a very large number produced for World War II and they are still being used.
Toyota
Toyota
France failed to score a single goal.
The person who scored the most goals in a single world cup was Just Fontaine. He was a French footballer who scored 13 goals during the 1958 Fifa World Cup finals tournament. < http://community.guinnessworldrecords.com/_Most-goals-in-a-single-FIFA-World-Cup-/PHOTO/9555078/7691.html >
There are many controversies about which is the best aircraft in the world. Many say Mig-25 is the best,some may say F-35 is the best. An aircraft has strenghths and weaknesses. We cannot say which is the best. Also it depends what you think is meant by best.
Not to sound cynical; however, Africa is a continent full of countries. There was no single president over Africa during WWII.