I guess, but they already know all the major stuff.

Isn't it a bit pointless now to separate the reviews?

And they are much more mature than your modern teenagers, but that doesn't mean that they have wisdom or experience that grown men do. Remember that this is only their first (and for Hvitserk, second) real combat experience, so it's not like they are amazing warriors and commanders who know how to behave before an…

They're not grown men. The reason why their arguments sound like they're a bunch of teenagers is because…well, they're a bunch of teenagers. Ivar is only 15 and the second-oldest Ubbe is 19-20. Bjorn is the only one who's actually a grown man.