Strong reinforcements were sent to Tonkin in the wake of the Retreat from Lạng Sơn (March 1885), bringing the total number of French soldiers in Tonkin to 35,000 in the summer of 1885.
Bala bantuan yang kuat dikirim ke Tonkin setelah Mundur dari Lạng Sơn (Maret 1885), sehingga jumlah total pasukan Prancis di Tonkin menjadi 35.000 pada musim panas 1885.