The destruction of the American Orbital Defense Network, and its air and naval fleets only prolonged the time until the Coalition defeat by the Alliance system of the United States. With an American decalartion of war, rather than the expected negotiations, Japan committed itself to an invasion of American assets on the Moon, believing that while they may not be able to win the war, they could at least secure their positions in Space. Japan easily captured the cities of Aldrin and Armstrong, securing the largest Helium-3 supplies outside of Triton, and pushed south to Tycho. Meanwhile American armored and robotic infantry units fought to secure Pacific territory from the Japanese, who had gone so far as to deploy troops to defend their assets in British Columbia and the Yukon, prompting an American invasion North into Canada. The United States bought crucial time for its Alliance in a daring strike on Japanese and Turkish facilities on Earth with the limited air forces, while the newly commissioned Space Force deployed Marines to defend Tycho along side American personnel stationed in Lunar military bases. Eventually the space forces retook Armstrong and Aldrin, and expelled Japan from the moon after the capture of Horikoshi Base. Even with Germany and France's entrance into the war, and the invasion of Poland led by the Turks, defeat was ultimately assured after the deployment of OCS Retribution, a canceled Orbital Command Station that had been steadily upgraded in the Tycho shipyards over the last decade, and the deployment of next generation hypersonic drones by 2054. Germany and France separately sued for peace after US reinforcements arrived in Poland, and by 2055 Japan and Turkey, beaten back to their original claims, surrendered at the Geneva Peace Conference.
After four years of fighting, World War III ended not with a mushroom cloud, or with an occupation of the enemy capitals, but for the sake of sanity, a ceasefire. The United States agreed to honor Japan's interests in Chita and Kamchatka, while Japan agreed to remove all forces from the rest of mainland Eurasia. Turkey accepted a Chinese presence in Central Asia, but was aloud to keep its Empire. Poland, having suffered the most during the war, screamed for Turkish blood, and demanded territory concessions from Germany. The United States vetoed these calls, but did impose limitations on the size and type of Turkish and Japanese near-space weapon systems, and a ban on all military space activities by every nation, save for itself of course. This drove what is now known as the Amero-Polish Schism, as even Poland was forbidden from developing space based weapon systems. The war established several new paradigms, the shift of European power to the East, American dominance over Space and Sea, and the shift from total war to war fought by precision and armored infantrymen. Many new states were carved out of the peripheries of the coalition to provide buffer zones, and keep Eurasia in chaos, and power in balance.
The United States gained more than just a formal recognition of its claims to space (though these territories would not be given any kind of representation in Congress), it also found itself directly occupying British Columbia (Cascadia) and the Yukon after the Japanese surrender, as well as direct control over the Guyanas after the French sued for Peace. With Britain in shambles still, American and former British forces organized a hasty alliance in the former Eurozone to prevent Polish expansion westward, but the degree of integration of Britain into the American system became so entrenched that the British found themselves in a Free Association with the United States, along with Newfoundland and even Australia by the end of the year. The ecological disaster from the flood effected many other territories far worse, but Britain was one of the few that was loosing its culture. With more than 70% of its population now living in either Newfoundland or the United States, many are unsure of what the future holds.
Hope may come from the Earth Working Group, a consortium of businesses, NGOs and governments that for the last ten years have undertaken an ambitious project to apply terraforming techniques being used on Mars and Venus to Earth to cope with the effects of climate change. After a decade of work in Greenland, Antarctica, Kazakhstan, the Sahara Desert, and the Australian Outback, as well as several smaller projects from Utah to the Great Rift Valley, sea levels have already fallen to 20 meters above pre-Anthropocene levels. Operations continued uninterrupted by the war, as artificial basins were created in existing basins and ancient river beads. The excess of sand and rock would be used to reconstruct the world's beaches, and create hills around the new Seas and lakes to create an artificial rain-shadow effect. New forests and grasslands were planted along the Kanduna river's expanded tributary, and around the growing new seas and rivers to further promote a healthy biosphere. With the positioning of several solar shields in polar orbit above the North and South Poles a rapid drop in polar temperatures and return the North and South polar ice has begun as well, further dropping sea levels. The shields would not return the Glaciers of the South Greenland Ice Sheet, however, as this ice sheet was the last of those from the ice age, and was doomed regardless of human intervention. Rather the temperature would fall just enough to keep snow on the ground and Solar radiation from being absorbed by rock and soil to heat the pole.
The Arctic nations were, naturally, furious at this effort, as it would return their lands to frozen tundra year round, and destroy their booming economies. With oil outmoded by space based energy sources however, the rest of the world turned a deaf ear to these calls, and now it seems war between the Arctic nations and their larger southern neighbors may come only a few short years after the end of the last world war.