Arab conquest of Armenia vs Arab Conquest of North Africa (639–698)

Arab armies flexibly employed raids, sieges, and negotiations as needed. The Byzantine-Armenian side adhered rigidly to defensive doctrine and struggled to adapt.

Byzantium remained locked into traditional heavy infantry and fortress defense doctrine, whereas Arabs fluidly transitioned between desert guerrilla tactics, urban sieges, and naval operations, achieving asymmetric superiority.

Attrition War

Battle of Annihilation

Arabs concentrated their main forces on strategic centers like Dvin, targeting the enemy's resistance core. Byzantium dispersed its forces across garrisons, failing to establish a center of gravity.

Amr ibn al-As correctly identified Egypt as Byzantium's African center of gravity, massing his forces there first. Subsequent conquerors recognized Carthage's strategic role, breaking the final resistance with a combined land-sea operation.

Arab commanders used multi-directional attacks and local allies to deceive and bypass Byzantine fortifications. Byzantine intelligence weaknesses left them vulnerable to these stratagems.

Arabs used dummy supply convoys and disinformation to mislead the Byzantine fleet while blocking grain shipments from Egypt. During Berber resistance, they exploited tribal divisions, collapsing Byzantium's allied network.

Arab light cavalry raids and archery barrages created a shock effect on Byzantine formations in field battles, while Byzantine heavy cavalry failed to serve as a counter-shock element.

At the Siege of Babylon Fortress, suppressing archer fire pinned the Byzantine garrison; at Nikiou, a heavy Arab cavalry charge shattered the army. Before Carthage, shock assaults supported by naval power annihilated the Byzantine will to resist.

Armenia's mountains and harsh winters posed natural obstacles for Arab armies, but they overcame them by exploiting seasonal transitions and plains. Armenian defenders utilized terrain well but lacked the political unity to convert it into strategic victory.

The Libyan Desert and vast North African plains offered natural operational spaces for Arab light cavalry raids, while climate and vast distances proved insurmountable logistical barriers for Byzantine garrisons. Control of the Nile and naval blockade of port cities cut Byzantine supply flows completely.

The Arabs correctly assessed Armenian political fragmentation and distrust of Byzantium, turning this intelligence into diplomatic and military advantage, while Byzantium remained ignorant of local dynamics.

During the Egyptian campaign, Coptic guides and local spies fed the Arab army real-time data on Byzantine garrison weaknesses, supply depots, and command changes, while Byzantine commanders repeatedly underestimated Arab strength and mobility, making fatal errors.

Arab armies advanced in multiple columns to divide the enemy and achieve interior line advantages through rapid movement. Byzantine-Armenian forces, reliant on heavy infantry, were slow to maneuver and could not match Arab cavalry.

Arab armies applied an interior line strategy, launching concentric offensives from Medina to Egypt, then rapidly across Cyrenaica into Africa. Byzantium, on exterior lines with isolated garrisons, failed to respond and was repeatedly encircled and destroyed.

Arab warriors' high morale, driven by faith and conquest, sustained them in harsh conditions, while leadership struggles and retreats caused a collapse in Byzantine-Armenian morale.

Successive catastrophes in the African Exarchate, the fall of Carthage, and lack of imperial relief led Berber mercenaries to defect and generals to adopt capitulationist attitudes, producing total psychological collapse.

Mu'awiya used negotiations alongside military force, enticing Armenian princes like Theodore Rshtuni to abandon Byzantium, thereby gaining territory without battle.

Amr ibn al-As incited the Copts against Byzantium and promised religious freedom, securing widespread collaboration. Before Carthage's fall, alliances with Berber tribes broke Byzantine resistance without combat.