单位类别
炮兵
由专业士兵管理的射程武器，发射的射弹主要用于突破和摧毁防御工事。
定义in_game/common/unit_categories/04_army_artillery.txt:1
2is_army = yes
3bombard = yes
5movement_speed = 2.0
8max_strength = 0
10supply_weight = 1.0
11attrition_loss = 0.5
13food_storage_per_strength = 5
14food_consumption_per_strength = 0.66
17damage_taken = 1.25
20frontage = 1
21initiative = 1
22combat_speed = 1
23flanking_ability = 1.0
24secure_flanks_defense = 0
27maintenance_demand = artillery_maintenance
28construction_demand = artillery_construction
31ai_weight = 0.4
32startup_amount = 2