Well, I really wish I could keep this website for myself, but I can't be greedy.

https://www.army-technology.com/projects/index.html

This site has roughly a hundred military-related vehicles and several images to go with each one. What's more is that once you find a helicopter or tank you like and have it's technical name, you can then search for it at Google.com and get even more images. I hope this helps people get some ideas.