Leo was a dachshund, residing in Pančevo, Serbia with the Ilić family for nearly two years. He was a pint-sized, spirited, and cheerful dog who adored people, and, in turn, people adored him. Little did anyone anticipate the reservoir of courage harbored within this diminutive being with short legs, until that fateful March day in 2014. At the time, a girl named Nikolina was gliding through her neighborhood on roller skates when, out of nowhere, a bull mastiff  pounced on her. 

Alerted by the cries, a neighbor rushed to the scene, accompanied by her own dog, Leo. Without hesitation, Leo valiantly sought to protect the girl, latching onto the leg of the much larger dog. The bullmastiff released Nikolina and engaged in a fierce battle with Leo, inflicting severe injuries upon him. Veterinarians in Pančevo contemplated euthanizing Leo due to his grave condition.

But Leo's owners couldn't bear the thought. They transported him to Belgrade, where he underwent a two-hour surgical procedure. Despite the efforts, two days later, Leo succumbed to the injuries sustained while endeavoring to save a child's life. The residents of Pančevo were determined to commemorate the indomitable spirit of this little canine hero.

In 2015, the "Ljubimac" Association spearheaded the unveiling of a monument in Leo's honor at the Narodna Bašta Park in Pančevo, a place Leo dearly cherished. The pedestal bears the inscription, "For all the diminutive heroes with colossal hearts," while above it rests a bust of little Leo, vigilantly watching over the children at play in the park, serving as a poignant reminder of the monumental feats achieved by humble heroes.