When Tamerlane was buried, a curse was

placed on his tomb.
It was said that whoever opened the Tomb would plunge humanity into a horrible war.
The Soviet Scientists opened the Tomb on the 21st of June 1941
- More Tamerlane legends, now basing on the memoirs of one of the people who opened the tomb
On the 20th of June he met 3 old men with an Arabic book in the nearby town, all three of whom tried to convince him not to open the tomb, as the book said it would cause a war.
On the 21st the tomb was opened.
As you may know on the 22nd of June the Soviet Union was under attack

Now! The person (the one who talked to the old wise men) was serving on the frontline and repeatedly asked to see Zhukov. In 1942 he was granted an audience, and he explained everything and Zhukov agreed to seal the tomb with the remains in it.
In 1942, 19th-20th of November the Tomb was re-sealed.
The very same day the Soviets started to recover at the Battle of Stalingrad.