Inspired by the latest Nazis vs. Soviets thread...
With a POD no earlier than, say, 1850, make it so Vladimir Lenin is a British general in the Boer War.
The only idea I've got is maybe his parents emigrate to Britain before he is born or when he's very young. However, they wouldn't be blue-bloods, which means getting Lenin into the officer corps, let alone commanding armies, could be kind of hard.