This is Valkyria Chronicles and this game is very fun to play !!
Explore different styles of command, control your desired unit and train them to be strong, which you can equipped them or even change class. That is right you can upgrade your desired unit to something more superior.
Playing the game is very interesting it has a story to follow and you will be the one to take over or choose what is the suitable tactics to dominate the battle field. It also features tanks so you will surely enjoy the game.
It has also an anime you can watch it.
Steam: https://store.steampowered.com/app/294860/Valkyria_Chronicles/