Grave 1628, the top right row, the third cross from the center.

A standard French Military grave marker; a white cross with an inscribed centerpiece.

Guy Agostini was born in 1893 and was from Detroit, Michigan and served with the French Foreign Legion. He enlisted in 1916 as Guido Hector Agostini arriving from Tarragon, Spain. He was killed near Verdun in August 1917 in close combat. 

A comrade commented: "France could know of the gallant death of Agostini. He was a quiet and most worthy youth. His prophecy on receiving the Croix de Guerre after Auberive was: "My next cross will be a wooden one." He was a pure idealist and a brave soldier.' 

He was awarded the Feench Legion of Honor and the Medaille Militaire for his actions.

Source: American fighters in the Foreign legion, 1914-1918 by Paul Ayres Rockwell 

From the Mémoire des homes (French Ministry of Defense) Website:

Guido Hector AGOSTINI

Mort pour la France le 31-08-1917 (Cumières, 55 - Meuse)

Né(e) le/en 09-12-1893 à Tarragone (Espagne) 23 ans, 8 mois et 22 jours

Career: 

Rank: Caporal

Unit: 1 R.M.L.E.

Class: 1916

Recruitment office: Marseille (13 - Bouches-du-Rhône)

Recruitment roll number: 67

Reference: Mort pour la France

Sépulture:

Place of burial: Chattancourt (Meuse)

Name of burial site: Nécropole Nationale 'CHATTANCOURT' 

Type of burial: tombe individuelle

Number of grave:1628