Wolseley accompanied the regiment to the Crimea, and landed at Balaklava in December 1854. He was selected to be an assistant engineer, and attached to the Royal Engineers during the Siege of Sevastopol. Wolseley served throughout the siege, where he was wounded at "the Quarries" on 7 June 1855, and again in the trenches on 30 August 1855, losing an eye.