Ключевые слова: america, american, ancient, army, base, battle, battlefield, blue, canada, cannon, civil, culture, defense, destruction, exterior, famous, fort, front, grass, green, gun, historic, history, lake, military, niagara, obsolete, old, ontario, ordnance, palisade, place, power, protection, side, sky, structure, war, water, weapon, wheel, white,