The major event involving the Muslim pilgrimage to Mecca that significantly influences Islamic history is the Hajj. This pilgrimage, which occurs annually, is one of the Five Pillars of Islam, compelling every Muslim who is physically and financially able to undertake the journey to Mecca at least once in their lifetime. The Hajj fosters a sense of unity among Muslims globally, highlighting themes of equality and spirituality. It serves as an essential aspect of Islamic faith, commemorating historical events in Islam and reinforcing community ties and worship.