Roman siege engines BC, and surrounded by Roman fortifications. As was standard siege technique at the time, "ballistae" were placed up in the towers with other soldiers armed with either bows or slings. The onager was a post-classical Roman siege engine, which derived its name from the kicking action of the machine, similar to that of an onager (wild ass). It is a type of catapult that uses torsional pressure, generally from twisted rope, to store energy for the shot. The onager consisted of a frame placed on the ground to whose front end a vertical frame of solid timber was rigidly fixed;
Spoor (animal) look carefully on the spoor in the trails" means to investigate what is actually going on in a sensitive situation. Spoor (animal) Spoor is a trace or a set of footprints by which the progress of someone or something may be followed. Spoor may include tracks, scents, or broken foliage. Spoor is useful for discovering or surveying what types of animals live in an area, or in animal tracking. The word originated c. 1823, from Cape Dutch "spoor", from Middle Dutch "spor", which is cognate with Old English "spor" "footprint, track, trace" and modern English language "spurn" (as in ankle).