ante diem iii idus apriles

421 B.C. -- Peace of Nikias brings the first phase of the Peloponnesian war (a.k.a. the Archidamian War) to an end (by one reckoning)

52 B.C. -- trial of Milo -- with Cicero on his side -- for the murder of Clodius (by one reckoning)

92 A.D. -- martyrdom of Antipas

145 A.D. -- birth of the future emperor Septimius Severus