[3] Smith, then with the 5th Company of the Bengal Sappers and Miners in November 1841, served in a force under Brigadier Wild, taking part in the advance on Ali Masjid in the Khyber Pass.

[3] Smith later rejoined the Headquarters of the Bengal Sappers and Miners at Delhi, and was shortly afterwards transferred to 7th Company, with whom he served in the later part of the Sutlej campaign.

[3] Posted to the 3rd Company, Smith served through the Punjab campaign in the Second Anglo-Sikh War, being present at the siege and capture of Multan and battle of Gujrat.

[3] Smith remained at the depot in Rurki until the outbreak of the Indian Mutiny in May 1857 when the a force from the Bengal Sappers and Miners were ordered to the immediate aid of the station at Meerut.

On 14 September 1857 at Delhi, British India, Sergeant Smith with two lieutenants (Duncan Charles Home and Philip Salkeld) and Bugler Robert Hawthorne showed conspicuous gallantry in the blowing in the Kashmir Gate in broad daylight under heavy fire.

His citation reads: For conspicuous gallantry, in conjunction with Lieutenants Home and Salkeld, in the performance of the desperate duty of blowing in the Cashmere Gate of the fortress of Delhi in broad daylight, under a heavy and destructive fire of musketry, on the morning of 14 September 1857, preparatory to the assault.