He would advance along the Tawi River , which was parallel to his route when sections of the road became impassable .
Despite the difficulty involved , Singh went ahead with the operation on 7 April 1948 .
Singh would advance along the Tawi River , which was parallel to Singh 's route when sections of the road became impassable .
Despite the difficulty involved , Singh went ahead with the operation on 7 April 1948 .