Wensleydale,
I take it you mean Isandhlwana and Rorke's Drift in the Zulu War.
At Rorke's Drift the Defenders, apart from Lt's Chard and Bromhead and the Commissary and Medical Staff, numbered 162 men - of whom at least 33 (and possibly as many as 80) were hospitalised. They defended that position inflicting some 850 casualties on the Zulu's at a cost of 17 dead and 10 wounded ( 2 of whom subsequently succumbed to their injuries).
Just what would you consider to be a "Gallant Defence" ?