Avalonia reveals tecnology formerly hidden from the public.
An element has been discovered that, when it is combined with iron in the right way and ammount, prevents rusting. Unfortunately, it is extremely hard to isolate, and little rust-proof iron has been made. Avalonia will sell the information for ten thousand iron spears.
To all you naysayers, this is historically and scientifically accurate.
Avalonia's national military currently ammounts to ten thousand heavy cavalry, twenty thousand light cavalry, five thousand archers, and fifteen thousand assorted infantrymen. Exact number of militia members is unknown.
First trespassers put to work constructing wall. They claim to come from a tribe to the north of Avalonia.
Avalonia accepts trade offer with Aemilius.