Banishment? You mean genocide, right?
If genocide is defined as "systematic and deliberate extermination of a group of people" then it wasn't genocide, because the intention was not to exterminate, but to relocate. Turkey absolutely needs to own up to what happened and pay reparations (even though it is a different country than the Ottoman Empire under which the events occurred), but in my opinion calling it genocide is inaccurate.
Here is Raphael Lemkin explaining it himself: https://www.youtube.com/watch?v=moByGLA7FDc
Genocide was thoroughly planned and executed by Ottoman Government which was run by Young Turks. Archives of multiple countries have documented evidence of the fact that it was Planned Systematic Extermination of Armenians - Genocide. There are archives from US embassy in Turkey, German archives, French Archives and press archives from that period that all confirm that.
Genocide did not start with marching people to deserts in Syria. It started with arrests and massacre of around 250 political and cultural leaders of Armenian origin, to prevent any organized resistance. [1]
Entire civilized world recognizes these events as a Genocide. One of the latest recognitions came from German government (in 2015). They were allies of Ottoman Empire by that time and did not do much to prevent the Genocide. [2]
Please do not spread misinformation and mislead people.
[1] https://en.wikipedia.org/wiki/Armenian_Genocide [2] https://en.wikipedia.org/wiki/Armenian_Genocide_recognition