on the strategic map, when you send your precious onagers to the front lines, never let them do the trip alone, always have at least a few meat shield accompany them, especially if you consider blitzing some walls in a heavily wooded region.

I'll always remember what happened to my onagers: I had sent my forces from Osca to take down Massilia, on the way they encountered some Julii, I decided to split my forces and pushed them into gallic Lugdunesis, my onagers sere left alone for a turn. Gauls in Narbo decide they want a punic war rather than a punic alliance, spring out of some forest and attack my onagers.

I lost my onagers, my forces were delayed in the taking of Massilia, reinforcements from Italy came, my double attack on post marius Rome from North and South was not so perfect after all.