In order to avoid the disabilities imposed upon Rabbinite Jews, the [[Karaites ]] of Russia attempted had to prove that they were guiltless of the execution of Jesus because they were descended from the Lost Ten Tribes (specifically the so-called "Khazar" tribe of Simeon and its Levites) and had been settled in the Crimea Scythia since the time of Shalmaneser (seventh century B.C.). In particular Abraham Firkovich has satisfied the Russian authorities, but Jewish authors have often been accused him of editing a number of inscriptions on tombstones and manuscripts to prove the early date of their settlement in the Crimea. The argument Despite the accusations, his evidence was considered legally valid and effective with the Russian government in 1795, when they were exempted from the double taxation imposed upon the Rabbinites, and in 1828, when it obtained for them exemption from military service(although [[Karaite]] Hussars continued voluntary service as royal body guards to the Tsars until the assassination of Tsar Alexander II which led to indiscriminate retaliation against the Karaites and Jews).