WORLDWIDE
In a flash, every Power Plant from the year 3000 is sent back to our time. Not only do we get knowledge of the future, but also a chance to use future energy systems.
Every immigrant from 1880 to 1920 appears and initially, it causes a overpopulation problem, only for it to swell down when many of the immigrants died without getting a Sultan's Relief.
ASIA
North Korea from the 50s realizes it can start again and become greater than it has before, but its economy would be its downfall. With no help from Russia, and a failure to keep up with current currency, North Korea dies out within the year, leading to South Korea annexing it, uniting the Koreas. Many of old North Korea is kept untouched for tourist spots.
EUROPE
The HMS Dreadnought finds itself in a futuristic place, but the inhabitants bring them to speed.
Many of the builders of the Great Pyramid of Giza would later find jobs elsewhere, while Khufu tells his Egyptian friends of his exploits.
The Maltese are shocked to find the Ottomans have disappeared. They do however become allies with Turkey.
AFRICA
In Somaliland, people are shocked to find a pile of valuables worth billions. To not crash the economy, the United Nations works to split the treasure equally.