Strategio is a military board game that has been around since the 1940s. It is a two-player game in which each player's goal is to capture the other player's flag while protecting their own. The game is played on a 10x10 board with 40 pieces representing different ranks of officers and soldiers. Players take turns moving their pieces and attempting to capture their opponent's pieces. The game requires strategic thinking and planning, as well as a bit of luck.