How do you build an onager?

It probably took no longer than fifteen or twenty minutes for the Roman to assemble their artillery, possibly less. The army was very efficient and as much of their artillery was disassembled after...

It was built on Louisiana Missouri. It says on back on the shirt of the build a bears It tells u the whole address

i don't know i want to build one in abilene tx.

so we can add decoration to earth