While campaigning, obama referred to the Armenian genocide as such. So did GWB, so did Clinton. But the US won’t officially acknowledge it. Most of the 50 states have done so.
Massacres of Armenians were happening in the 1890’s, but during WWI it was even worse. It is believed that a million plus died. Many were forced to march into the Syrian desert, to starve to death.
The Armenians, of course, were mainly Christians, and even conversion to Islam did not save them.
GWB promised he would acknowledge it as president, but when he was president, he didn't. Same with Obama. Turkey is our boss.