The Battle of Marilao River was fought on March 27, 1899, in Marilao, Bulacan, Philippines, during the PhilippineAmerican War. It was one of the most celebrated river crossings of the whole war, wherein American forces crossed the Marilao River, which was 80 yards (73 m) wide and too deep to ford, while under Filipino fire from the opposite bank.

Emilio Aguinaldo y Famy (Spanish: [eˈmi.ljo a.ɣiˈnal.do i fa.mi]: March 22, 1869 – February 6, 1964) was a Filipino revolutionary, statesman, and military leader who is officially recognized as the first and the youngest president of the Philippines (1899–1901) and the first president of a constitutional republic in Asia. He led Philippine forces first against Spain in the Philippine Revolution (1896–1898), then in the Spanish–American War (1898), and finally against the United States during the Philippine–American War (1899–1901).

Aguinaldo remains a controversial figure in Filipino history. Though he has been recommended as a national hero of the Philippines, many have criticized him for the deaths of the revolutionary leader Andrés Bonifacio and general Antonio Luna, as well as his sympathies for the Japanese Empire during their occupation of the Philippines in World War II.