The article below is just a basic introduction to the topic. For something more advanced, written by pros and a fantastic leveling guide, my recommendation would be this Elder Scrolls Online Leveling Guide. I could not find any other guide that comes even close in terms of the impact it had on me.
Nothing could be said more for the Ebonheart Pact; a pact that was established only for the mere fact the factions shared a strong rivalry with one another. Distrust, arrogance and slavery now form what is now called, the Ebonheart Pact.
Almost made of glass but strong a steel, the Ebonheart Pact was fragile but it contains strong alliances. Within the Alliance, are the Nords, Dunmers and Argonians. And respectively, the Pact controlled much of the Eastern regions in Tamriel stretching from Skyrim, Morrowind and Black Marsh.
The faction was lead by the Nord named Jorunn the Skald-King, whom was humorous but he rules with an iron fist. The Alliance’s purpose was unclear why it was formed and what purpose it sought to achieve; however, with the invasion of Molag Bal’s armies and scattered chaos amongst the land, it was understandable the factions would do anything to remain free of chaos, tyranny and ultimately, further conflicts.