Ukraine
Sitting right beside Russia, Ukraine needs to have a pretty powerful defense in place to be able to rest easy. Thankfully, this nation delivers. They currently own and operate 3,784 combat tanks, a much higher amount than most countries have. They have 255,000 actives and 900,000 in their reserves.
Sweden
Don't mess with Sweden and Sweden won't mess with you. Another fairly neutral country, Sweden prefers to keep their military numbers low. At any given time, they keep about 21,000 active soldiers working for the defense. In terms of equipment, they have 160 combat tanks, 138 fighter jets, and 5 submarines.