Arsacid Armenia, the Adoption of Christianity, and the Early Medieval Period
What to master
Focus on the Arsacid (Arshakuni) dynasty, the conversion of Armenia, and the creation of the Armenian alphabet. Know the traditional date of the Christianization under King Trdat (Tiridates) III through Gregory the Illuminator, conventionally 301 CE (some scholarship proposes c. 314), making Armenia the first polity to adopt Christianity as a state religion. Understand the role of the Armenian Church (later "Apostolic") and its non-Chalcedonian position after the Council of Chalcedon (451), formalized in the Armenian rejection at the Council of Dvin (506) and later. Know the Battle of Avarayr (451) under Vardan Mamikonian against Sasanian Persia and its aftermath (Treaty of Nvarsak, 484) as a symbol of religious resistance. Crucially, know Mesrop Mashtots and the Armenian alphabet (c. 405), which anchored a distinct literary and liturgical culture. Note the early medieval fragmentation under Byzantine and Arab rule and the rise of the Bagratid principality.
Traps
Do not assert 301 as undisputed-questions may flag the 314 alternative. Do not equate Avarayr with a military victory; it was a defeat followed by negotiated religious toleration. Do not confuse the Armenian Church's miaphysite/non-Chalcedonian stance with Nestorianism or with full communion with the Byzantine Orthodox Church.
Rule of thumb
Link alphabet (405), Bible translation, and church identity: the alphabet made Armenian Christianity linguistically self-sustaining.
Worked example
If asked why the alphabet mattered politically, answer that it enabled vernacular scripture and liturgy, reducing dependence on Greek and Syriac clerical centers and reinforcing a distinct Armenian ecclesiastical identity.