What remembrance day held on April 25 features a riderless horse leading the march?
Riderless horse A riderless horse (which may be caparisoned in ornamental and protective coverings, having a detailed protocol of their own) is a single horse, without a rider, and with boots reversed in the stirrups, which sometimes accompanies a funeral procession. The horse follows the caisson carrying the casket. A riderless horse can also be featured in military parades to symbolize fallen soldiers. In Australia for example, it is traditional for a riderless horse known as the 'Lone Charger' to lead the annual Anzac Day marches.
Casimir Pulaski Day Casimir Pulaski Day is a local holiday officially observed in Chicago, Illinois on the first Monday of every March in memory of Casimir Pulaski (March 6, 1745 – October 11, 1779), a Revolutionary War cavalry officer born in Poland as Kazimierz Pułaski. He is praised for his contributions to the U.S. military in the American Revolution and known as "the father of the American cavalry".