BERLIN, April 21 (Reuters) - The German military will end its Patriot anti defence units in fellow NATO members Slovakia and Poland this year, a spokesperson for the defence ministry was quoted as saying, as Berlin tries to make the best use of its limited military resources. Germany dispatched the first two of the three units to Poland in January while the Patriot air defence system started arriving in Slovakia from NATO partner countries last March, shortly after the start of the war in Ukraine, to help reinforce the defence of NATO's eastern flank. See here for a complete list of exchanges and delays