Well J.C. did have many teachers. All Jedi learn from others even though there is the master/apprentice relationship. The Jedi believe in sharing knowledge though they have to weigh the decision, Is it for the greater good. I had to switch to third person because it felt right. There are some stories that switch from first to third somewhat: Dracula and Frankenstein though I'm not sure they would count because they switch from one person to the other. J.C. is only reflecting what he has heard from others.
To answer your question, the war was the one between his people and the Argonons on the planet Mikkado. The one mentioned in Chapter 1. It was to show that while these people are ambassadors, they are just like the rest of the galaxy, with problems and hatreds. Working on Chapter 3, will post soon.