Germany

Germany:
The Geman Kaisserreich was established by the Prussian state and France and Britain quickly juxtaposed it as the great powers in Europe.
Tensions Rising (1901-1921):
Over the Nineteenth century, while nations were grasping for their piece of space, tensions were flaring up, despite or maybe because of the vast web of alliances. During this time Germany lost one of its closest allies when Austria-Hungary collapsed when the war with Serbia went downhill and internal struggles were pushed to the max. During this war, Austria-Czechia managed to take all of the Croatia lands that were held by Hungary.
During this time to keep new revolutionary ideologies at bay, countless of communists and socialists were slaughtered, including foreign revolutionaries like Vladimir Lenin. This slaughter would continue into their politics with McCarthyist like political corruption being rampant. This would only increase after a Dutch socialist tried to shoot the Kaiser during a speech, one of many assassination attempts.
The Great War (1921-1927):
The Great War would start when on April fifth 1921 an old disheartened French soldier travels to Germany and plants a bomb in a pillar close to where the Kaiser would hold his speech. On this faithful day, the Young son of Kaiser Wilhelm chose the worst place to lean against and the bomb unleashed its full force onto the kid. This stopped most of the explosion and debris meaning few others were hurt. But when the Kaiser after the shock of the recent assassination attempt came to his senses little recognisable was left of his child. 
When the French soldier was caught trying to flee over the French border, it didn’t take long for an already armed Germany to declare war on France. When Germany attacked Belgium too, Britain, who guaranteed its independence, quickly stepped in. 
The allied nations of Britain and France only managed to keep the German army at bay with the massive industrial help and volunteer forces of the United States of America. The American volunteer forces actually managed to push German lines back.
The Murder of the Three Wilhelms (1927):
After six years of war, the Kaiser had continued his hobby of going to plays. When the Kaiser went to his favourite play and brought his remaining sons with him, something was off. Midway through the play during the nth assassination attempt, a bomb went off under the table. This time, however, the killer was successful and the Kaiser was killed.
The new Kaiser, Kaiser Friedrich, was widely considered to be a weak Kaiser, and when images of the front made it back in droves, the German populace was disheartened and demoralised. Calls for peace were made around the country and the German leadership relented. 
The Peace Deal (1927):
When France and Germany came together to draw up peace deals. In the end, it was agreed that the original borders would be kept and France was to pay incredibly high war reparations.
The six-year-long brutal war saw millions of deaths and ended in no border changes at all. This broke much of the continent and extremist ideologies grew in numbers. During this time the third french republic broke down, and Britain had to step in to help France stabilise.
The Great Depression (1931-1936):
During the Post-War Great Depression, Germany saw its markets and economy slump. The Fourth French Republic also defaulted on its debt and Germany had to lessen its demands. While this was a time of much upheaval, Germany managed to leave this era pretty much unchanged. The 1933 Spartan Uprising was put down with moderate ease and the 1935 Herculean Uprising was put down after 4 months of moderate conflict.
In this time many German businesses collapsed. The German parliament feared a complete breakdown of law and order and sought methods of regaining their grip on their faltering economy. The German Chancellor pushed through a bill allowing for the establishment of a nationalised car manufacturer. This car manufacturer would only be allowed to sell their cars to the German people and had to sell them very cheaply. This car was meant to be a true car for the German people, a true Volkswagen.
Simultaneously, the German parliament pushed through a bill to increase the extent of the autobahn. These long-term investments are generally accepted to have helped Germany hasten its recovery and that of the world’s economy.
The Lost War (1941)
The Newly Invigorated Germany eager for any war gains, after the Great Depression, Declares war on the Russian puppet of Poland, sighting violence against ethnic germans for their reason of war. This war while seeing a lot of hasty conflicts and battles again saw much trench warfare and become a complete and utter bog for both sides.
The Polish Insurrection:
Many Polish intellectuals and elites had been plotting behind Russian and german ears for a completely independent Poland. The Wartorn and manpower depleted Germany in the west were looking weaker than ever and again budding head with England. Meanwhile, in the east, Russia was at its knees due to proletariate uprising all over the nation and had its forces spread out thin.
General Władysław Eugeniusz Sikorski took command over the unexploited polish garrison and used its revolutionaries as a new Polish army. Meanwhile, Jadwiga Piłsudska took led forces to take the few still intact Russian bases. Not knowing what was happening most Russian garrisons simply led these polish forces in. they took over any available planes and tanks in the region.
Continuation of the War:
Germany originally took over large swathes of land but when new polish forces, grown out of never before exploited manpower reserves for fear of insurrection, counterattacked and surrounded tow large German groups. Germany was pushed back and had to let go of many of its lands as its depleted army simply couldn’t hold on to its large frontlines. The frontlines were mostly stabilised and when Russia signed peace deals with the new Polish state at the cost of helping on breaking down a Ukrainian insurrection.
Seeing the new influx of highly patriotic and moralised Polish troops and given the recent Oil and Steel Revolts in the west, Germany sued for peace and the new frontlines were drawn. Germany was given the port city of Danzig as a lease port and the city of Konigsburg was to be given complete independence.
The Oil and Steel Rebelilion:
The German worker, tired of years of war and terrible working condition rose up in the west. These radical workers followed the 61 year old communist master mind, Ernst Thälmann. The Workers had hidden munitions and guns under the veil of over represented duts. The German state was unable to keep this uprising at bay in the beginning, as most of its men were fighting the newly refreshed polish army. However, The Kaiser terified of a communist take over of germany agreed to terrible peace conditions with the polish state. This allowed germany to crack down on its own populace with universally disliked actions, and thus germany was looking as weak as ever.