Ok guys, sorry for the inactivity, here is a military update of the Illyrians:
Illyrian warfare: There is not a lot of info on the weaponry the Illyrians used, because they mostly used weapons their enemies used, mainly of Greek and Roman origin. Their weapons and armor include the Sica dagger/short sword, Sibyna/sigyna - a long iron spear - archeologists found this weapon all across the Illyrian regions, especially in Bosnian necropolises. The Illyrian army also used a 20-30cm long "battle knife", battle axes (all of these were found in warrior graves), bows and arrows obviously, and regular swords (mostly imported from neighbouring regions). Most Illyrian tribes used round shields, which resembled Macedonian type shields a lot. The only REAL difference among Illyrian units would be that the tribes in the northern parts should resemble Celts, as they were under the influence of the Celtic tribes. I've included some pictures, though most google results and searches end up on showing images from various TW games and mods
Other than this, there really isn't anything that unique about their military. The Illyrians were known to create fortifications, and some of the famous ones include Tilirium and Setova of the Dalmatae tribes. These forts were usually hill-forts of round or oval shape. As mentioned before, they were great sailors, and I guess their navy would be their biggest strength. I've added a picture of Liburna because it is the only one which has a decent depiction. Couldn't find the Pristis ship, and Lembus pics are tiny.
http://imgur.com/a/Icbvs