Oh... So deportation is what you now call the forced death marches. This was ethnic cleansing which turned into genocide as the Armenians were driven into starvation and fell down dying like flies is lines which stretched 100 miles.
The Armenians never invaded Turkey. There was no such thing as Turkey. It was the Turks who invaded and independent Armenia and started massacring its people through a systematically organised state sponsored genocide beyond the scale of even Adolf Hitler.
Naturally the Armenians wanted to liberate themselves from Turkish occupation. They were resisting brutal Turkish persecution in their own land which the Turks were and still are illegally occupying.
Turks systematically killed their people, kidnapped raped and tortured their children and treated them as second class citizens with no democratic rights for over 400 years. The Turkish massacres of Armenians were going on since the 1800's. Why should the Armenians have let themselves be massacred by the Turks in their own land. The Armenians had the right to defend themselves and the right to liberation.
It is also laughable to call the Armenian genocide a civil war where both sides had dead. Was the Jewish holocaust a civil war as well ? The Armenians were not part of any Turkish state. The ottoman empire had completely disintegrated. This was no a civil since the Armenians were not attempting to take political control of all of Anatolia. It was an act of aggression by the Turks to annihilate an independent Armenian state.
https://youtu.be/bEKR9UU90So