During the Lạng Sơn Campaign (February 1885) and the campaigns of March 1885 around Tuyên Quang and Lạng Sơn, both brigades of the expeditionary corps contained two marching regiments (régiments de marche), each of two or three battalions, with supporting artillery, Tonkinese skirmishers and field hospital and engineering detachments.
Selama Kampanye Lạng Sơn (Februari 1885) dan kampanye Maret 1885 di sekitar Tuyen Quang dan Lạng Sơn, kedua brigade korps ekspedisi berisi dua resimen berbaris (régiments de marche), masing-masing dari dua atau tiga batalyon, dengan artileri pendukung, penskirmis Tonkin dan rumah sakit lapangan dan detasemen teknik.