In a decision that could undermine already strained relations with Warsaw, the Israel Defense Forces will no longer send delegations to Poland to learn about the Holocaust. Instead, officer delegations will visit Lithuania, in a decision that has also drawn criticism. Named “Witnesses in Uniform,” the project began around two decades ago as a Holocaust remembrance program for military personnel. Within its framework, career officers and commanders, reserve soldiers, family members of fallen soldiers and Holocaust survivors comprise delegations that visit the sites of death camps in Poland and participate in memorial services. Over the past two years, however, all...