Keep Your Items Stocked
Buying items can be an easy thing to forget in Valkyria Revolution, especially with so much else to spend your money on. However, it’s critically important that you keep your stock up, especially later in the game as an item can save you from defeat in a pinch. The Vanargand Headquarters in Elsinore has a quartermaster that’ll sell you basic use items, like things that restore your health or RP. As the game progresses you’ll unlock new and more powerful items to buy, and controlling more territory on the world map will even reduce the prices.
When buying items you can see how many of each type you’ll be able to bring into battle, although you won’t be able to bring your whole stock. Just make sure you at least have the minimum so you can use the items in a pinch for whatever you might need.