Hello peelaw66
While George served in the Afghan war with the 67th Foot, I don't believe Joseph saw service in that campaign, so is a bit outside both this topic and my expertise, I'm afraid. With that in mind, I did look up Joseph for a brief biography:
Ensign (without purchase) 1st West India Regiment Dec 1855 (seems he stayed with this rgt. throughout); Lieutenant Aug 1857; Captain Aug 1869; Major Sep 1876; Lt.-Col. Jan 1879; Appointed to command regiment Mar 1882; Colonel Jan 1883; Hon. Major-General Jan 1884, retired.
I note that George William Smith died at Addiscombe, though his funeral was at Brighton.
Best wishes -
Garen