Omdurman 1898?
I recall the Swedish historian Peter Englund, who as a PhD student really like military boardgames, actually decided to make one, Isandlwana. And he approached a major UK games company, who like it and wanted to publish it. BUT, they wanted to make it a combo, a British defeat and a major victory from the colonial wars period. So they wanted Omdurman.
He made it, but that was, as testified by Englund, a bit of a hellish proposition to even begin to make a viable game out of. At Omdurman no Sudanese got closer to the Anglo-Egyptian lines than 300 yards, before being cut down in a hail of fire. Churchill gave them props for the size of their stones, since regardless the Sudanese kept coming. But still, never closer than 300 yards... The British losses to the infantry were incurred when walking over the battlefield, post-battle. (There was a more even, but insignificant, cavalry action that Churchill took part in, but it mattered not for the outcome.)