In December 1916 he had, from the Capitain Andreoletti, a short leave to visit his family. It was the last time that his parents were seen him with its full integrity of his phisycal aspect. When he wasn't along the first lines, he went down in Malga Ciapela with the responsability to make an high section of riflemen, in particular to use the hand bombs. During the morning of 12 March 1917, Delcroix was advertising that one of his rifleman was died due to an unexploded bomb. He was deeply troubled and he went to the victim. To see the face, he had a presentiment:
"Under the snow, that concealed the face,
I saw my self, that I'll be
and I didn't leave this ice from me:
I don't know which voice called me..."
Without wasting time he decided to clean the area, with his hands and he neutralized many weapons. The last bomb that he toke, exploded in his hands. He was immediately rescue from his soldiers, but his conditions was very serious. Thanks a great fortitude and his mother's force, which name was Ida Corbi Delcroix, he survived with terrible mutilations.