well at the end of the round its hats off to Team HHADs collaborative effort
The four moustache petes are
Lord Chelmsford - Battle of Isandlwana - Anglo Zulu War
Lord Cardigan - Charge of the Light Brigade - Crimean War
Douglas Haig - Battle of the Somme - WW1
George Custer - Little Big Horn/Custers Last Stand - Indian Wars.
And the theme that links them is, as spotted, great military blunders and slaughters.
In order they run Cardigan, Custer, Chelmsford, Haig
The odd man out is as spotted Custer, as he is a yank, and he actually died in the combat cockup he is famous for leading. Chelmsford absented himself from the battle, Cardigan survived the charge, and Haig never went anywhere near the front lines he sent tens of thousands of men over to their deaths.
Hats off troops and jolly well done those men!

"Science flew men to the moon. Religion flew men into buildings."
"To sin by silence makes cowards of men."