Advance Wars features a diverse array of units, each with unique strengths, weaknesses, and roles on the battlefield. Infantry and Mech units are your basic ground forces, capable of capturing properties. Recon and Tank units provide offensive power and mobility. Anti-Air and Missiles are crucial for defending against aerial threats. Artillery and Rockets offer long-range bombardment, while Fighters and Bombers dominate the skies. Naval units like Battleships, Cruisers, and Submarines control the seas.

It's vital to understand the 'rock-paper-scissors' dynamic between units. For example, Anti-Air units are highly effective against air units but weak against tanks. Tanks are strong against infantry but vulnerable to indirect fire. Always consider the unit's movement range, attack power, defense, and fuel/ammo capacity. Deploying the right unit for the right situation is a cornerstone of successful strategy. We'll delve deeper into specific unit stats and matchups in later sections, but for now, familiarize yourself with their general roles.