Hey all, I am currently writing a history paper on American Tanks and Tank Doctrine from the end of WWI through WWII.

Basically I want to cover how WWI shaped American tank development and doctrine initially and how events through WWII helped these to evolve.

I know a decent bit of info on the topic, but nothing too specific aside from a few details and just the general info of the tanks (Which will be useful in it's own right but I can't right a paper about the specifications of the M4 Sherman and its variants).

I've spent about an hour trying to find sources for this paper, and have come up short for anything actually usable as a source. I found the National WWII Museum which gives a summary on some tanks, but that's about it. Naturally as a standard college student, I'm no good at finding sources.

The requirements for the paper are at least three primary sources, and no more than 3 secondary. I think the primary sources would be the most difficult to find, but I'm sure they exist in some form, be it speeches or documents.

If anyone wants to shoot me some sources on tank doctrine, development, the Lend-Lease program, or anything that might be useful for this topic I would greatly appreciate it. Even a point in the right direction would be helpful. I'm going to keep looking myself but I'm honestly not expecting to find enough sources on my own.

Thank you all in advance!