I have found that the in-game tutorials are very unhelpful. The Diplomacy one was bad enough, but with the 'release a general' tutorial, it kept telling me to click on a highlighted menu; I had opened the locked generals panel (by guesswork) but I could find no highlighted menu whatsoever. I gave up -like I had done with the Diplomacy tutorial.
The English used in the tutorials is also poor - not in terms of spelling or grammar, but in terms of easily getting across its meaning.