Original sentence: Roberts fought in the Indian Rebellion of 1857 seeing action during the siege and capture of Delhi where he was slightly wounded, and being present at the relief of Lucknow, where, as Deputy Assistant Quartermaster-General, he was attached to the staff of Sir Colin Campbell, Commander-in-Chief, India
Edited sentence: Roberts fought in the Indian Mutiny of 1857 seeing action during the siege and capture of Delhi where he was slightly wounded, and being present at the relief of Lucknow, where, as Deputy Assistant Quartermaster-General, he was attached to the staff of Sir Colin Campbell, Commander-in-Chief, India