Outstanding quality RTS that any military nut would enjoy. Will also stress out your grey matter, too. If you aren't familiar with the Wargame series, it's a borderline strategic simulator more than an RTS. No base building, no real resources (besides point income from holding sectors), and every unit has morale, health, ammo, and fuel that needs to be tended to carefully with supply lines.
The scale is unlike what most other games in the genre offer. It reminds me almost of the original Supreme Commander in terms of sher volume of units on the field and map size. Every unit you take into battle will never come back alive once destroyed, and you need to make your own decks of units to take into battle, which is almost a kind of game in itself...finding the right unit combos or roles to take. One of the major reasons I recommend this game is because of that.
The army variety and unit selection is also awe inspiring. You can pick from about 1,500 units, all modeled correctly to their real counterpart and act like the real one too. Nations to build from include the US, Canada, France, UK, Germany, Australia, New Zealand, Japan, South Korea, Norway, Sweden, Denmark, Poland, Russia, Czechoslovakia, East Germany, China, and Best Korea (I mean North Korea). There's an army for everyone's taste and they all feel and play unique.
Naval battles need some work and balancing, though, but it also may be just the nature of modern warfare on the ocean. It revolves around who makes the biggest ship blob and has the best radar gattling gun screen to stop incomming cruise missiles.
Overall if you wanna work your brain a little in an RTS and focus entirely on the war and not the bases/economy, this is the thing for you.