 Tureen also worried about the delay-related defenses of laches, adverse possession, and statute of limitations.Tureen's team discovered the six-year federal statute of limitations for actions by the federal government for money damages related to Indian lands, 28 U.S.C.§ 2415(b)—which treated prior claims as arising on the date of its passage, July 18, 1966—a mere eighteen months before the it was due to expire on July 18, 1972.