The world has witnessed how Croatia battled their way through the 2018 FIFA World Cup Final. Today, the team will take on France in the country's firstever World Cup championship contest.

Much of Croatia's success can be attributed to the nation's "Golden Generation," made up of well-respected players like Barcelona midfielder Ivan Rakitic, Juventus striker Mario Mandzukic and Real Madrid midfielder Luka Modric.

As the Croatian team's captain, Modric has shown tremendous leadership, providing excellent passes and crucial motivation during the team's several overtime appearances. He may have developed that strength under pressure during a uniquely challenging childhood.

When Modric was just six years old, his family became refugees. Yahoo Sports recounts that Serbian militants attacked Modric's hometown of Modrici, on December 8th, 1991. His grandfather was shot, his home was burned to the ground and his family was forced to flee for their lives.

"When the war started we became refugees, and it was a really tough time,” The Sun reports Modric saying in 2008. “I was six years old. These were really hard times. I remember them vividly, but it’s not something you want to remember or think about."

After being uprooted from their home, Modric and his family moved to the city of Zadar, Croatia, and struggled to make ends meet. "We lived in a hotel for many years as we struggled financially, but I always loved football," he recalls. "I remember my first shin pads had the Brazilian Ronaldo on them, and I loved them."

According to Canadian media organization The Loop, Modric grew up practicing soccer in empty parking lots and remembers hearing grenades in the background. But despite these difficulties, the captain says he is stronger today because of the challenges he has faced.

“The war made me stronger, it was a very hard time for me and my family," reports The Sun. "I don’t want to drag that with me forever, but I don’t want to forget about it either.”

This article is prepared with outputs from The Sun, Goal & CNBC.