Hundreds of Russian soldiers have escaped the fighting in Ukraine or refused to take part during the early stages of the war, according to military decrees viewed by The Wall Street Journal as well as accused soldiers and lawyers defending them. Military analysts and Ukrainian officials say there have been many more. Russia’s army stumbled badly early in its invasion of Ukraine and suffered thousands of casualties and the loss of an estimated quarter of its deployed military hardware, a senior Pentagon official said in April. Desertions and insubordination among soldiers, Interior Ministry troops and members of the National Guard...