If it walks like a duck…
James Whitcomb Riley

By 1917 it seemed to Lenin that the war would never end and that the prospect of revolution was rapidly receding. But in the week of March 8–15, the starving, freezing, war-weary workers and soldiers of Petrograd (until 1914, St. Petersburg) succeeded in deposing the Tsar. Lenin and his closest lieutenants hastened home after the German authorities agreed to permit their passage through Germany to neutral Sweden. Berlin hoped that the return of anti-war Socialists to Russia would undermine the Russian war effort.

Do you remember the story about the early American Colonists “gifting of blankets and linens contaminated with smallpox” to the native inhabitants of the place?
It worked, to a degree, because the natives had no prior experience with the disease. Their immune systems had no prior experience with this pathogen. Which had been construed as an opportunity by those who had cooked up the plan, even though – in those times – nobody had any idea about ‘immunity’.

Lenin was also effective towards pulling the Czarist Empire out of WWI. Do we really care whether he was aware of the fact that he had been used as a 5-th column by Kaiser Wilhelm II’s strategists?

Do we learn anything?