A.T. Robertson Commentary Mark 13:7

"And when ye shall hear of wars and rumors of wars, be not troubled: [these things] must needs come to pass; but the end is not yet." — Mark 13:7 (ASV)

Must needs come to pass (δε γενεσθα). Already there were outbreaks against the Jews in Alexandria, at Seleucia with the slaughter of more than fifty thousand, at Jamnia, and elsewhere. Caligula, Claudius, Nero will threaten war before it finally comes with the destruction of the city and temple by Titus in A.D. 70. Vincent notes that between this prophecy by Jesus in A.D. 30 (or 29) and the destruction of Jerusalem there was an earthquake in Crete (A.D. 46 or 47), at Rome (A.D. 51), at Apamaia in Phrygia (A.D. 60), at Campania (A.D. 63). He notes also four famines during the reign of Claudius A.D. 41-54. One of them was in Judea in A.D. 44 and is alluded to in Ac 11:28. Tacitus (Annals xvi. 10-13) describes the hurricanes and storms in Campania in A.D. 65.