What territorial losses has Ukraine experienced since Russia's military actions began, particularly following the 2022 full-scale invasion?

Ukraine has suffered significant territorial losses through two phases of Russian military action. Initially, over a decade ago, Russia annexed Crimea and deployed troops to Ukraine's eastern Donbas region, supporting separatist movements in Donetsk and Luhansk. The situation dramatically worsened after Russia's full-scale invasion on February 24, 2022. Since the 2022 invasion, Ukraine has lost nearly 20% of its total territory. Russia's territorial gains have been substantial, with over 4,000 square kilometers captured in the most recent year alone, demonstrating the ongoing and escalating nature of Ukraine's territorial losses.