thought the usual invasion strategies are to invade the cities first. control the big and medium cities especially the railways lines passing through the cities, control or open up the railways, highways and major roads ( the transportation network of the country ) to facilitate the army to move troops and supplies swiftly across the land. the less important areas of the country will be fought later. why so much talks about the jungles. die die must fight my troops in the jungles at the war onset ?