Millions of Shia Muslims are currently undertaking arduous journeys on foot towards Karbala, Iraq. These pilgrims are participating in Arbaeen, a deeply significant religious observance commemorating the fortieth day after the martyrdom of Imam Hussein (AS), the grandson of the Prophet Muhammad. The annual event draws devotees from across the globe, demonstrating one of the largest peaceful gatherings in the world. Pilgrims endure challenging conditions, often walking long distances, as an act of devotion and remembrance. The Iraqi city of Karbala is preparing to host these millions of visitors, providing facilities and managing the influx of people. Arbaeen reflects a central event in Shia Islam and is a powerful display of faith and solidarity.