68. =Galba=, =Otho=, and =Vitellius= succeed each other as emperors. 69. =Vespasian=, the first Flavian emperor, proclaimed by the soldiers. Vitellius put to death. The aristocratic body purified and replenished. Official worship restored. Public works executed. Reforms in the army and the finances, and the administration generally. Batavian revolt under Claudius Civilis. 70. Fall of Jerusalem. Batavian revolt quelled by Cerealis. 71. Cerealis becomes governor of Britain. 78. Agricola begins his campaigns in Britain. 79. =Titus=, the second Flavian emperor. Pompeii and Herculaneum destroyed by an eruption of Vesuvius. 80. Agricola reaches the Solway Firth. 81. =Domitian=, the third Flavian emperor. 83. War with the Chatti. 84. Caledonians under Galgacus defeated by Agricola, who completes the conquest of Britain. 86. Dacian invasion of Mœsia. 87. Dacians defeat a Roman army. 90. Peace with the Dacians. 93. Antonius Saturninus, governor of upper Germany, revolts. The rebellion is put down and his papers are destroyed. Domitian executes the supposed accomplices of Saturninus and begins a series of cruelties. Philosophers expelled from Rome. Persecutions of Jews and Christians. 96. =Nerva= succeeds on the murder of Domitian, and introduces a policy of mildness. 98. =Trajan=, emperor. 101-102. Dacians attacked and overthrown by Trajan. 106. Dacians finally subdued by Trajan. Their country becomes a Roman province. 114. Parthian War undertaken to prevent the Parthian king from securing the Armenian crown to his family. 116. Parthian War ends with the incorporation of Armenia, Mesopotamia, and Assyria amongst the Roman provinces. Trajan dies on his return. Many public works were executed in this reign. 117. =Hadrian=, emperor. He abandons Trajan’s recent conquests. 118. Mœsia invaded by the Sarmatians and Roxolani. Hadrian concludes peace with the Roxolani. The Sarmatian War continues for a long time. 120-127. Hadrian makes a tour through the provinces. 121. Hadrian’s wall built in Britain. 132. _Edictum perpetuum_, or compilation of the edictal laws of the prætors. 132-135. Second Jewish War, beginning with the revolt of Simon Bar Kosiba. Many buildings were erected in Hadrian’s reign. 138. =Antoninus Pius=, emperor. He promotes the internal prosperity of the empire, and protects it against foreign attacks. 139. British revolt suppressed by Lollius Urbicus. Wall of Antoninus (Graham’s Dyke) built. 161. =Marcus Aurelius= and =Lucius Verus=, joint emperors. 162-165. Parthian War. It terminates in the restoration of Armenia to its lawful sovereign and the cession of Mesopotamia to Rome. 163. Christian persecution. 166. A barbarian coalition of the Marcomanni and other tribes threatens the empire. Both emperors take the field against them. 169. Lucius Verus dies. 174. Victory over the Quadi. Miracle of the Thundering Legion. 175. Avidius Cassius proclaims himself emperor, and makes himself master of all Asia within Mount Taurus. He is assassinated.