So, what I can say about Axel :
Yes he was a US Marine, he enlisted on November, 21, 1916 in the US Marine Corps. He was assigned to the 45th company, 3rd battalion , 5th Marines regiment , 4th Brigade , 2nd Division AEF. His serial number was 118065, he was a Sergeant in that company when he was killed on June 13, 1918.
I can't relate here all the battle of Belleau Wood, but I invite you to visit the web pages following where you could find : links to site relating a day by day account of the Battle of Belleau wood and all sites relative to Belleau Wood, maps, etc............
http://www.worldwar1.com/dbc/ct_bw.htm
or www.Scuttlebuttsmallchow.com/links.html
and my web page and link to know exactly what I do for remenbrance of the soldiers and Belleau Wood museum at :
www.Scuttlebuttsmallchow.com/bwmuseum.html
The 5th Marines arrived in my area by end of May 1918, to stop the Germans on their way to Paris, they were stopped on the Marne River at Chateau-thierry on June1st, the bridge in the town was blown up before they crossed the river, so they pushed in direction to the northwest of Chateau-thierry along the Paris Metz road , Belleau Wood which is at about 10 kilometers at northwest from Chateau-Thierry was taken, and also littles villages of Vaux and Bouresches & Torcy. On June 1st & 2nd the 2nd Division AEF arrived in that area to stop the Germans because the French were retreated to Paris..........The 4th Brigade which was composed from the 5th & 6th Marines and 6th machine Gun Battalion, was sent in front of the Germans back of Belleau Wood on the left side from Paris metz road which was the objective for the Germans, on June 3 & 4, the German advance was definitively stopped by the Marines and on June 6, 1918, the Marines were to attack on left side and right side from Belleau Wood and last attack of the day on Belleau Wood itself, the wood will be taken only on June 25th, at cost of more than 1000 marines killed and more than 4500 wounded..........It was terrible for the Marines they lost more men that in all history of the Corps.......
On June 6, 1918, at about 5.00 PM the Marines from the 3rd battalion were attacking accross an open wheat field leading to Belleau Wood, they crossed about 700meters in the open, and the Germans were waiting the Marines at edge of the wood with machine-guns, the Axel's company the 45th was decimated that day, and his battalion commander the Major Berry was severely wounded, Axel was very lucky that day to be not killed but was later.........So, Belleau Wood, and villages of Bouresches and Vaux and Torcy were strongly fortified by the Germans and taken after a long and deadly fight.......during three weeks..........!!
So, Axel was killed in action at 2.30 AM on June 13, 1918, at that time his battalion was in line at southwest from Belleau Wood in a little village named Bouresches, the village was holding by the Marines since June, 6, 1918 , and the 3rd battalion was in support of the 6th regiment USMC, when the german launched an attack to try to take again the village, they started to shell the village with explosive and gas shells, then they started assaulting but village was still holding by the Marines after the attack, you said that Axel was killed near Maison Blanche which is located at about 6 kilometers from the village of Bouresches along the road from Paris to Metz, so I don't know if Axel was really at that place when it was killed because it's far from the front line from his battalion that day.......So, I think that he was killed near Bouresches, on the USMC records I have , they said that the place of burial was unknow, so perhaps that body was brought back at or near Maison Blanche and he was buried very close, but can't verify these informations.......at that time Maison blanche was used as post of command for the 6th Marines, and also first aid station for the Corpsmen of the Navy who were acting as Medical unit for the Marines....................
Belleau wood is now a sanctuary dedicated to all the men who lost their life for a part of land from France, It was bought by the american after the war, and there is a big cemetery in front of wood where are buried 2289 american soldiers...........( But look for all the web sites that I indicated to you.......)