The walls were reinforced by bricks and cement; with loopholes (French: meurtrières) allowing the men to repel enemy attacks.

Two wagons were combat engineer specialized oriented, with no armour, they were in charge of transporting all the necessary material (including train rails) to parry a sabotage and/or reconstruct the railway when needed.

The Armoured Legion Train accordingly resisted all ambushes, halted all sabotages and was the enduring Rolling Symbol during the chartered course duration of French Indochina.

Silver circled steel bandage railway; at the center on a green and red background is detached an Eastern Dragon and a golden grenade with 7 flames, encircled by a golden border with inscription: TRAIN BLINDE - AES TRIPLEX DEO JUVANTE, in both French and Latin.

The steel railway indicated the vocation of the unit; the grenade with 7 flames and green and red colors are the symbols of the Legion; the insignia : "Triple Alloy, God is helping", actually means "Showing Great Courage, God is helping", is referring to the armouring of the train.