Hey, so my very first map, I may be making more(But don't be expecting one where Japan takes control of Korea, there's enough of those already). The time and technology is similar to ours, but computers, airplanes, automobiles, and the internet is not widespread. I have most of the back story done, so I'll post it if anyone requests it, but I'll add the country names(Antarctica is uninhabited):
North America: Canada-Light Blue Quebec-Very Pale Blue American Empire-Blue
South America: Colombia-Dark Purple Argentina-Pale Purple Brazil-Purple
Europe: Germany-Bright Blue Nordic Alliance-Pale Pink
South Pacific: Australia-Dark Grey Oceania-Light Grey
Africa(Kind of Confusing): Egypt-Bright Red Algeria-Burnt Red Morocco-Very Pale Red(?) Mali-Dark Yellow-Green Nigeria-Green Congo-Somewhat Paler Green Ethiopia-Very Bright Green Tanzania-Very Pale Green Ndongo-Sea-foam Green Boer Republic-Bright Yellow-Green Madagascar-Green Islands to the east of Africa
Asia: Kingdom of Judah-Very Bright Pink Arabia-Bright Pink Persia-Brown Scythia-Bright Orange Siberia-Tan India-Light Blue Tibet-Light Green Mongolia-Orange China-Dark Orange Vietnam-Dark Green Siam-Dark Blue Borneo-Red Indonesia-Pink Philippines-Purple Joseon-Nippon Alliance-Bright Yellow
I'll first explain major changes prior to the 20th century by sections.
In 925 AD, the Korean states of Silla and Balhae united against the growing Liao dynasty, and was able to successfully defend its from both the Liao and Jin dynasty. In 1290, Silla(the dominate force in the union) became a vassal state of Mongolia with a minor war. The Mongolian Empire fell in the 1400 to the Ming Dynasty, after nearly half a century of decline, but existed in modern Mongolia before absorption into the Ming Dynasty during the 1630's.
During the time, a third major Scythia nation emerged around the Aral Sea, using the name to justify its expansion through central Asia, stopping its expansion when its border met that of the Timurid Empire. During the time, Scythia lasted until falling to an alliance between the Russian Empire and Timur Dynasty in 1784. The Timur Empire itself never moved southward and lasted until the 1870's, when it was split into four separate colonies of the British Empire.
Silla fell to a rebellion in the early 14th century and was replaced by the Joseon state, very much like that of our world, except with more independence from the Ming. In 1590, Hideyoshi, who united Honshu and Shikoku, proposed Joseon to submit to Nippon(Japan), but a year later, an equal union was created between Joseon(controlling modern day Korea, and most of Manchuria) and Nippon(controlling Shikoku and Honshu). With help from Korea, Japan was able to gain control of Kyushu, and the Ryukyu Islands, while puppet states were created in Sakhalin and Hokkaido. Joseon with help from Japan was able to conquer the rest of Manchuria.
In 1604, the Joseon-Nippon Union declared war on the waning Ming Dynasty, indirectly helping the formation of th Manchu Qing Dynasty, which disliked the Union because of its conquest of Manchuria. The Union conquered most of northern China before the end of the war.
One major change was the survival of the Kalmar Union until modern times. During the Swedish uprising Gustav of Sweden was able to Take over the union instead of just getting independence. The Union gradually expanded to rule over all of Scandinavia, the Baltic and part of present day Russia. However the union sold Greenland to England in the 1700's, and lost the Baltic to independence movements and much of Finland to the Russian Empire in 1810 before making peace.
In 1658, at the death of Oliver Cromwell, the power of the Protectorate was fought over between his sons Henry and Richard, as well as his daughter Elizabeth and her husband, John Claypole. As a result, the British Isles were soon divided into five different states and lost many of its colonial possessions. However, the British Isles were united in 1670 under the Kingdom of Great Britain, an absolute constitution, and quickly regained control of its colonies, as well as gaining control of the Caribbean and colonies in Africa.
The French Revolutionary Wars started instead in 1806, and Great Britain and America stayed neutral. France focused mostly on the eastern front and was allied with the Dutch Republic, Portugal and the Polish Legions, against the Italian States, Russia, and Prussia and the Holy Roman Empire, the two of which merged into the Holy Roman Empire against the French threat.
The war ended in 1817, and resulted in the Holy Roman Empire annexation of the Dutch Republic, unification of Italy, which also colonized Corsica, and the division of France into the northern Bourbon Empire, and the southern French Republic. Portugal and France had their possessions in America forfeited to Spain, although Spain soon lost most of its territory in America. The devastation of the war on France caused millions of French citizens to flee to Quebec, now a part of Great Britain, but with a large majority of France diaspora.
Africa(references in relation to fictional world unless specified):
Colonization of Africa first started around the 15th century. The Berlin Conference over Africa never happened because of the tension left after the French Revolutionary Wars, and instead led to multiple minor wars between imperialist powers. By the 1800's, most of Africa was colonized by European powers. Germany was able to colonize most of central Africa, controlling the present day Congo and Ndongo. Portugal gained control of Madagascar, the southern half of modern day Tanzania, and as well as southern Africa excluding our worlds South Africa. Spain controlled the western half of Algeria and Mali. The Bourbon Empire of France gained the northern portion of Tanzania.
United Italy possessed Egypt, the eastern half of Algeria, and the eastern portion of Ethiopia. Russia colonized modern day Nigeria, although having little power inland of its territory. Great Britain had a colony in South Africa and originally had a colony in the southern portion of Morocco. Although America had kept from creating colonies in Africa, America helped the Kingdom of Morocco and the Ethiopia Empire remain independent nations. America assisted Morocco to conquer British held territory bordering Morocco to the south. America also helped Ethiopia in defending its central and coastal lands from Italy and the expansion of Great Britain.
Having won independence in 1819. Argentina was the first state in South America to gain independence and waged war on a weakening Spain, and successfully gained control of southern Chile, as well as the Falkland Islands from Great Britain. In 1824, the Empire of Brazil was formed and quickly conquered the colonies of Spain and England in the Guiana Shield. In 1833, New Granada, the last colony of Spain in the Americas, declared independence as Colombia, with no resistance from Spain, as Spain focused more on its African colonies. Colombia then expanded southward through Peru, abandoned by Spain with the independence of Colombia, until bordering Argentina.
In 1870, Brazil declared war on Colombia, trying to expand territory. Fearing a border with a powerful, Brazilian empire and losing its South American Allies, America, as well as Argentina, aided Colombia against Brazil. As a result of the war, Colombia gained the rest of Venezuela from Brazil, but lost Acre to Brazil. Colombia also signed of Panama to America and the rest of Chile to Argentina for their assistance.
The first divergence was the delay of the annexation of Texas into America, which did not occur until 1857. Because of the absence of the Mexican-American war, the First Mexican Empire was able to survive decades longer. By the time of annexation, Texas normalized relations with Mexico and became a vassal to Britain, who wanted to limit the expansion and growth of America, although the population of Texas still flavored joining America. In 1854, Texas revolted against Great Britain and her ally, Mexico. America, now wanting to annex Texas, supported Texas in the war, invading British Canada, supplying troops to Texas and invading Mexican territory.
America had also convinced its ally, Tsar Russia, to invade Great Britain. Although Tsar Russia greatly lost to Great Britain, having to forfeit Alaska to Great Britain, Russia was successful in diverting British attention from Texas to Russia. America was able to defeat Great Britain, taking control of Maritime Canada, as well the Caribbean. America was able to defeat the Mexican Empire, and continued to annex the empire, but was placed under military control.
Antarctica and South Pacific:
Little change from our time line before the 20th century. Antarctica was not first officially documented until the 1870's. Australia was still settled and colonized by Great Britain. New Zealand was colonized by the Kalmar Union, while the South Pacific, including New Guinea, was colonized by Germany, except for Hawaii, which was settled by America.
I decided to add the 20th century onto my next map, showing the two halves of the 36 countries.