The History of Germany is the same as in our timeline up to 1870. German Barbarians still destroy the Roman Empire. The Middle Ages is the same. Napoleon still crushes the Holy Roman Empire, everything is the same.
The American Civil War was a war between the Confederate States of America and the United States of America. It ended in a bloody stalemate. Britain and France joined the war on Confederate side. Prussia and Austria on the side of the United States side. The war continued in 1882 and ended in 1888, at the same time WWI took place. It ended with another stalemate. It started again from 1914-1918 with the Second World War. Then from 1939-1947 with both countries collapsed. The western United States joined the Empire of Japan. Eastern joined Nazi Germany.
The German Unification was the same as in our world. However France didn't cede Alscane-Lorraine to Germany, instead had to give 50% of its economy to Germany. The Austrian Empire merged with Prussian dominated Germany after the unification of 1870. However, France was secretly given money from the U.K.
After unification Germany sought to expand its empire so it took got some territory in Africa,the Pacific, and China. In China it got: -Jiaozhou Bay In the Pacific it got: -German New Guinea (Deutsch-Neuguinea, today Papua-New-Guinea
- Bismarck Archipelago (Bismarck-Archipel)
- German Solomon Islands or Northern Solmon Islands
- Bougainville (Bougainville-Insel, 1888–1919)
- Nauru (1888–1919)
- German Marshall Islands (Marshallinseln; 1885–1919)
- Mariana Islands (Marianen, 1899–1919)
- Caroline Islands (Karolinen, 1899 – 1919)
- Federated States of Micronesia (Mikronesien, 1899–1919)
- Palau (1899–1919)
-German Samoa (German Western Samoa, or Western Samoa; 1899-1919/45)
- Samoa (1900-1914)
In Africa it got: -German East Africa - (Deutsch-Ostafrika)Tanganyika -Ruanda-Urundi
-Wituland -Kionga Triangle -German South West Africa - (Deutsch-Südwestafrika)
-Botswana - (Südrand des Caprivi-Zipfels) German West Africa (Deutsch-Westafrika) -Kamerun -Togoland
World War 1 started in 1882, right after the formation of the triple alliance.