KYIV (Reuters) – Ukrainian forces are piling pressure on Russian troops in the southern region of Kherson that Moscow occupied at the start of its invasion of Ukraine on Feb. 24. Losing control of the region would be another big setback for President Vladimir Putin. Here is why the region is strategically important for the course of Russia’s war in Ukraine. GATEWAY TO CRIMEA Kherson region borders Crimea and provides Moscow with a land bridge to the Black Sea peninsula that it seized from Kyiv in 2014. Ukraine retaking swathes of Kherson region would deprive Moscow of that land corridor. It wo…