Hundreds of thousands of families have been making the journey through Europe, including many children who are fleeing violence in places like Syria and Iraq. As fall sets in and temperatures begin to drop, their trek becomes even more urgent as they hope to find a safe, warm place ahead of winter.
World Vision videographer Ralph Baydoun is along the border of Serbia and has captured some of their stories.
The above shows the struggle for children who are ill-equipped for the weather as temperatures fall. This next video tells Alissar's story, a 10-year-old girl trying to reunite with her mother after fleeing Syria.
Here is a behind-the-scenes look at efforts to aid those who are making the journey.
Since the beginning of this crisis, World Vision has helped more than 2 million people in Syria, Lebanon, Jordan, and Iraq, focusing on food, basic supplies, health care, water and sanitation and Child Friendly Spaces. The organization is now scaling up work in Europe to provide aid in Serbia in response to thousands of refugees, distributing food and hygiene items and providing safe spaces for mothers and children.