Bows
From Crusaderkings
province_event = { id = 3000
name = "TECH_DISCOVERY" map = yes tag = shortbow picture = event_techinvention trigger = { condition = { type = capital value = yes } condition = { type = not value = { type = has_advance value = { shortbow = yes } } } condition = { type = advance_focus value = shortbow } }
mean_time_to_happen = { months = 50