Hussain was highly respected within society, and his endorsement would carry great weight. Yazid needed a man like Hussain to follow his rule in order to provide legitimacy to his corrupt government. But Hussain was a man of morals and strived for social justice. Hussain could not sit and endorse Yazid and spoke out against him, despite it being a risk to his life Hussain chose to make the ultimate stand for social justice. He chose to leave his hometown along with his family and a few companions. When word reached Yazid of Hussains stand, he sent an army of 30,000 to force Hussain to obey his rule. 

Yazid knew full well that Hussain had a great amount of influence, and that what started as a small stand with his family and companions could become a stand of tens of thousands of people. Thus, Yazid gave Hussain an ultimatum. Either obey him or die. 

Hussain did not want any violence and did not want anyone to die, however he knew he could not sit and obey Yazid, he chose instead to stick to his principles. Having refused to obey him, Yazid ordered his men to kill Hussain on the 10th day of the first month of the Islamic calendar (Muharram). This day is known as The Day of Ashura.