Notes:

Edit: Actual source was found by Fallenangel700. They still specialise in cute military girls though, so that's still there if your interested.

So it appears the original creator of this art specialised in drawing military waifus and was yeeted off of Tumblr for some reason, so you'll just have to search through this archived gallery of cute anime girls in military uniforms to find it.

Oh woe is you.