You will find that war is a delicate science. How you proceed depends upon the shaping factors in your game. In this guide, i've been playing on Huge Map, maximum Civs (set to random). The specifics may vary depending upon what era you will wage the war. In this discussion, I will focus on wars waged during the modern era. I ALWAYS play as an Industrious Civ (Either Egypt or France) due to the insurmountable advantage of the Worker's production. These principles/ideas will work with any Civ.
What are your biggest challenges?
1. Established Civs. First of all, when fighting in the modern era, most of your competition is established. Most of the geography in the map should be fully occupied. Most borders have been established and your enemies have had time to develop their armies by now.
