1406 Arsenal Master attacks the Reinado with his Kishin, but is defeated by grouped forces of adventurers. That's one battle I would like to hear about in more detail.
Then you'll be wanting to read the Contra Arsenal adventure book. It's basically this battle turned into a big high-level campaing, including the construction and handling of another big mecha to fight the Kishin with. It's my favourite adventure in the setting, by far =P
I also think it's interesting to note that there's so much boring foundering of towns and bookeeping on the lives of characters because it's a 10+ years old setting (I think it's about to come to its 15th birthday, if I'm not mistaken). So there's a lot of backup story to cite in the timeline, that's been told through novels, comics and adventures. The story of the fall and corruption of the Paladin is in the Holy Avenger series, a brazilian manga-style comic that span 42 issues and a few specials. The liberation of Valkaria from the statue is also an epic-level adventure, as is the battle against the Kishin. And so on.
Also, pirates. The setting is usually very criticized for being a cut-and-paste of too many things that don't necessarily add together, but are there mainly because they're cool. Other people, though, (like me) think that's exactly one of its most charming points =P Pirates go there that way too, they're there because they're cool, period. There's a small excuse for them (they don't attack merchant ships, but mainly adventuring parties that are exploring coastal dungeons), but other than that, they are just an application of the Rule of Cool.
Though you'll want to see the setting's cowboys, there's a whole sourcebook for them...