Last Saturday when Don and I drove to the air show, he mentioned a Youtube video of an old War Department film on assembling a P-47 in the field. He sent the link to me, and now to you.
The United States had a unique challenge in World War II - it was thousands of miles from the theaters of conflict (we should always have such problems, right?). It was a major logistical challenge to get the tools of war to the front. This is a creative solution for getting fighter planes from factory to airfield overseas: ship it in a big crate and then have a crew assemble it on the spot.
No power tools were involved. After watching this I must confess to having a whole new appreciation for the term "Greatest Generation". Oh, and Don (retired Air Force) points out that the pilots who took the birds on that first flight were pretty tough hombres.