Cavalry (n)
(in the past) soldiers who fought on horseback.
Epidemic (n)
a widespread occurrence of an infectious disease in a community at a particular time.
Mayhem (n)
violent or damaging disorder; chaos.
Catastrophic (adj)
involving or causing sudden great damage or suffering.
Eluded (v)
evade or escape from in a skillful or cunning way.
Regiment (n)
a permanent unit of an army typically commanded by a colonel and divided into several companies, squadrons, or batteries and often into two battalions.