Military technologies enhance the combat effectiveness of your units. Found in Barracks, Stables, Artillery Foundries, and Docks, these upgrades improve unit attack, health, and armor. Researching these upgrades is crucial for maintaining a competitive edge in battles. Prioritize upgrades for the units you are massing or those that are central to your strategy. For example, if you're playing as the British, focus on Musketeer upgrades. Also, consider technologies that improve unit speed or line of sight. research 'Guard' and 'Imperial' upgrades as you age up, as these provide significant stat boosts to your core military units. A fully upgraded army will often triumph over a larger, un-upgraded force.
