true of false? When the United States refused to hand over the Philippines to Filipino rebels, a vicious guerilla war with racial overtones broke out between the former allies?

True. When the United States acquired the Philippines from Spain after the Spanish-American War in 1898, Filipino rebels, who were seeking independence, were disappointed that the U.S. did not grant them immediate independence. This led to the Philippine-American War (1899-1902), which culminated into a vicious guerrilla war with racial overtones between the two former allies.

To confirm the accuracy of this information, you can consult reliable historical sources such as books, academic articles, and reputable websites that specialize in Philippine-American history or the Spanish-American War. These sources will provide detailed accounts, analyses, and perspectives on this period of history.