Of course, that was "only" the main event. Decades before 1915, there had already been severe pogroms against Turkish Armenians. And between 1913 and 1922-1923, an estimated 350,000 Greeks lost their lives too at the hands of Turkish henchmen, an episode which culminated in the sack of Smyrna:
But the world doesn't learn. As if to emphasize this point, the "president" of the supposedly mightiest nation on Earth just caved in to Sultan Erdogan in refusing to label the massacre of around 1,5 million Armenians what it is... a full-fledged genocide.