The annual Arbaeen pilgrimage is currently underway in Iraq, attracting tens of millions of participants from around the globe. This significant event commemorates 40 days after the martyrdom of Imam Hossein, a central figure in Shia Islam. Arbaeen is widely recognized as the world’s largest peaceful gathering, demonstrating a massive display of religious devotion. Pilgrims travel to the holy city of Karbala to pay their respects and participate in mourning ceremonies. The influx of visitors presents logistical challenges for Iraq, but also fosters a sense of unity and shared faith. This year’s pilgrimage follows ongoing security measures to ensure the safety of attendees. The event highlights the enduring importance of Imam Hossein's legacy for Shia Muslims worldwide.