The most significant military campaign undertaken during the Flavian period was the siege and destruction of Jerusalem in 70 by Titus.
The destruction of the city was the culmination of the Roman campaign in Judaea following the Jewish uprising of 66.
The Second Temple was completely demolished, after which Titus's soldiers proclaimed him imperator in honor of the victory.
Jerusalem was sacked and much of the population killed or dispersed.
Josephus claims that 1,100,000 people were killed during the siege, of which a majority were Jewish.
97,000 were captured and enslaved, including Simon Bar Giora and John of Giscala.
Many fled to areas around the Mediterranean.
Titus reportedly refused to accept a wreath of victory, as there is "no merit in vanquishing people forsaken by their own God".
Upon his return to Rome in 71, Titus was awarded a triumph.
Accompanied by Vespasian and Domitian, he rode into the city, enthusiastically saluted by the Roman populace and preceded by a lavish parade containing treasures and captives from the war.
Josephus describes a procession with large amounts of gold and silver carried along the route, followed by elaborate re-enactments of the war, Jewish prisoners, and finally the treasures taken from the Temple of Jerusalem, including the Menorah and the Torah.
Leaders of the resistance were executed in the Forum, after which the procession closed with religious sacrifices at the Temple of Jupiter.
The triumphal Arch of Titus, which stands at one entrance to the Forum, memorializes the victory of Titus.

The conquest of Britain continued under command of Gnaeus Julius Agricola, who expanded the Roman Empire as far as Caledonia, or modern day Scotland, between 77 and 84.
In 82 Agricola crossed an unidentified body of water and defeated peoples unknown to the Romans until then.
He fortified the coast facing Ireland, and Tacitus recalls that his father-in-law often claimed the island could be conquered with a single legion and a few auxiliaries.
He had given refuge to an exiled Irish king whom he hoped he might use as the excuse for conquest.
This conquest never happened, but some historians believe that the crossing referred to was in fact a small-scale exploratory or punitive expedition to Ireland.
The following year Agricola raised a fleet and pushed beyond the Forth into Caledonia.
To aid the advance, an expansive legionary fortress was constructed at Inchtuthil.
In the summer of 84, Agricola faced the armies of the Caledonians, led by Calgacus, at the Battle of Mons Graupius.
Although the Romans inflicted heavy losses on the Caledonians,  two-thirds of their army managed to escape and hide in the Scottish marshes and Highlands, ultimately preventing Agricola from bringing the entire British island under his control.

The military campaigns undertaken during Domitian's reign were usually defensive in nature, as the Emperor rejected the idea of expansionist warfare.
His most significant military contribution was the development of the Limes Germanicus, which encompassed a vast network of roads, forts and watchtowers constructed along the Rhine river to defend the Empire.
Nevertheless, several important wars were fought in Gaul, against the Chatti, and across the Danube frontier against the Suebi, the Sarmatians, and the Dacians.
Led by King Decebalus, the Dacians invaded the province of Moesia around 84 or 85, wreaking considerable havoc and killing the Moesian governor, Oppius Sabinus.
Domitian immediately launched a counteroffensive, which resulted in the destruction of a legion during an ill-fated expedition into Dacia.
Their commander, Cornelius Fuscus, was killed, and the battle standard of the Praetorian Guard lost.
In 87, the Romans invaded Dacia once more, this time under command of Tettius Julianus, and finally managed to defeat Decebalus late in 88, at the same site where Fuscus had previously been killed.
An attack on Dacia's capital was abandoned, however, when a crisis arose on the German frontier, forcing Domitian to sign a peace treaty with Decebalus which was severely criticized
The most significant military campaign undertaken during the Flavian period was the siege and destruction of Jerusalem in 70 by Titus. The destruction of the city was the culmination of the Roman campaign in Judaea following the Jewish uprising of 66. The Second Temple was completely demolished, after which Titus's soldiers proclaimed him imperator in honor of the victory. Jerusalem was sacked and much of the population killed or dispersed. Josephus claims that 1,100,000 people were killed during the siege, of which a majority were Jewish. 97,000 were captured and enslaved, including Simon Bar Giora and John of Giscala. Many fled to areas around the Mediterranean. Titus reportedly refused to accept a wreath of victory, as there is "no merit in vanquishing people forsaken by their own God". Upon his return to Rome in 71, Titus was awarded a triumph. Accompanied by Vespasian and Domitian, he rode into the city, enthusiastically saluted by the Roman populace and preceded by a lavish parade containing treasures and captives from the war. Josephus describes a procession with large amounts of gold and silver carried along the route, followed by elaborate re-enactments of the war, Jewish prisoners, and finally the treasures taken from the Temple of Jerusalem, including the Menorah and the Torah. Leaders of the resistance were executed in the Forum, after which the procession closed with religious sacrifices at the Temple of Jupiter. The triumphal Arch of Titus, which stands at one entrance to the Forum, memorializes the victory of Titus.
The conquest of Britain continued under command of Gnaeus Julius Agricola, who expanded the Roman Empire as far as Caledonia, or modern day Scotland, between 77 and 84. In 82 Agricola crossed an unidentified body of water and defeated peoples unknown to the Romans until then. He fortified the coast facing Ireland, and Tacitus recalls that his father-in-law often claimed the island could be conquered with a single legion and a few auxiliaries. He had given refuge to an exiled Irish king whom he hoped he might use as the excuse for conquest. This conquest never happened, but some historians believe that the crossing referred to was in fact a small-scale exploratory or punitive expedition to Ireland. The following year Agricola raised a fleet and pushed beyond the Forth into Caledonia. To aid the advance, an expansive legionary fortress was constructed at Inchtuthil. In the summer of 84, Agricola faced the armies of the Caledonians, led by Calgacus, at the Battle of Mons Graupius. Although the Romans inflicted heavy losses on the Caledonians,  two-thirds of their army managed to escape and hide in the Scottish marshes and Highlands, ultimately preventing Agricola from bringing the entire British island under his control.
The military campaigns undertaken during Domitian's reign were usually defensive in nature, as the Emperor rejected the idea of expansionist warfare. His most significant military contribution was the development of the Limes Germanicus, which encompassed a vast network of roads, forts and watchtowers constructed along the Rhine river to defend the Empire. Nevertheless, several important wars were fought in Gaul, against the Chatti, and across the Danube frontier against the Suebi, the Sarmatians, and the Dacians. Led by King Decebalus, the Dacians invaded the province of Moesia around 84 or 85, wreaking considerable havoc and killing the Moesian governor, Oppius Sabinus. Domitian immediately launched a counteroffensive, which resulted in the destruction of a legion during an ill-fated expedition into Dacia. Their commander, Cornelius Fuscus, was killed, and the battle standard of the Praetorian Guard lost. In 87, the Romans invaded Dacia once more, this time under command of Tettius Julianus, and finally managed to defeat Decebalus late in 88, at the same site where Fuscus had previously been killed. An attack on Dacia's capital was abandoned, however, when a crisis arose on the German frontier, forcing Domitian to sign a peace treaty with Decebalus which was severely criticized 
Flavian dynasty