Rubuta ci gaba don wannan sakin layi - A cikin Gaul, sansanin soja na Alesia ya kasance a karkashin Roman siege
a cikin 52 BC, kuma kewaye da Roman fortifications. Kamar yadda aka saba amfani da shi a lokacin, an saka "ballistae" a cikin hasumiya tare da wasu sojoji da makamai ko dai baka ko kuma harsashi.