Unfortunately, just because of a map size and inability to zoom-out beyond certain level inside game, it can be hard to get a quick grasp of overall situation. In order to help myself and other new players I have created map with clearly marked strategic towns and provinces, depot locations and major roads and rivers. If you like and find useful this strategic map, please say thanks.
Also, I made large planning map (at maximum in-game zoom out level) with symbols representing towns, cities, forts, major roads, strategic locations and depots. Please, let me know if someone needs this version and I will upload it.

EDIT: French and Indian War Strategic Map v2.0 added