Retired Army Col. Xenophon Herbert Price, 86, a military aide to President Wilson who helped train and equip Army railway engineers during World War I, died Thursday of cardiac arrest at The Washington Home.

In 1916, after serving with the Army Corps of Engineers for two years, Col. Price became a military aide to President Wilson. When the U.S. entered the war the following year, he helped train and equip the 11th Engineers [Railway] Regiment, with which he later served in France.

From 1923 to 1935, as secretary of the American Battle Monuments Commission headed by Gen. John J. Pershing, he was in charge of the construction of war memorials for American forces and of eight American cemeteries in Europe.

Col. Price prepared both a history of World War I, "American Armies and Battlefields of Europe," and "A Guide to the American Battlefields in Europe" for the commission.

After serving in Europe during World War II, he retired and made his home in Washington.

Col. Price was born in Saginaw, Mich. He graduated from the U.S. Military Academy at West Point and earned a master's degree in civil engineering from the Massachusetts Institute of Technology in 1921.

His military decorations include the Distinguished Service Medal with oak leaf cluster, the Legion of Merit, the Bronze Star Medal and the French Legion of Honor.

He was a longtime member of the Army & Navy Club in Washington and the Chevy Chase Club.

Survivors include his son, Kent M., of Stanford, Calif.; a brother, Ralph A., of La Grange, Ill., and six grandchildren. CAPTION: Picture, COL. XENOPHON HERBERT PRICE