Operation Atlantic Resolve

Operation Atlantic Resolve was a NATO effort to respond to Russian Aggression that lasted from 2015 and ended in 2021. It is here when tensions between east and west began to degrade at an alarming rate. A few thousand troops from NATO members were being deployed in Estonia, Latvia, Norway, Romania, Bulgaria, Lithuania, Poland and even Ukraine, a non-NATO member throughout 2017. The Black Sea in Eastern Europe was also monitored by ships from the Standing NATO Maritime Group in later 2018. The main purpose of Atlantic Resolve was to ensure the security of NATO's Eastern Flank.

Background
Operation Atlantic Resolve kicked off in 2015, shortly after the Russian annexation of Crimea and the beginnings of "Russian Aggression" in Eastern Europe. NATO had several member states sharing borders with Russia, some of these nations being part of the former Soviet Union itself. It was believed that Russia had hundreds of thousands of troops in Western Russia, ready to march into Europe in a moments notice if necessary. In summer of 2016, it was announced that NATO would be sending troops to reinforce their Eastern flank against Russia.

They followed through with this plan in early 2017, with the first troops arriving in Lithuania from Germany in February. Canada, Germany, the United Kingdom and the United States would lead the operations in Latvia, Lithuania, Estonia and Poland, respectively. Poland would see the greatest military build-up in it's north, with over 4,000 US forces backed by smaller amounts of troops from other NATO states. Germany would serve as the alliances reserve unit with tanks and forces deployed here on stand-by if necessary. Alongside deployment of forces, several military exercises in Ukraine, Bulgaria, Romania and Norway would take place, as well as the training and strengthening of Ukraine's military.

Russia retaliated by moving ballistic missiles and WMDs into the Kaliningrad Oblast, just north of Poland. Countries like Germany, Denmark and Czechia were now in range of Russia's arsenal. The United States would already have nuclear and ballistic missiles located in Poland and Turkey.