The United States has upon various occasions expressed a humanitarian interest in the natives of Africa. In 1884 two delegates were sent to the Berlin conference which adopted a general act giving a recognized status to the Kongo Free State. The American delegates signed the treaty in common with the delegates of the European powers, but it was not submitted to the Senate for ratification for reasons stated as follows by President Cleveland in his annual message of December 8, 1885: "A conference of delegates of the principal commercial nations was held at Berlin last winter to discuss methods whereby the Kongo basin might be kept open to the world's trade. Delegates attended on behalf of the United States on the understanding that their part should be merely deliberative, without imparting to the results any binding character so far as the United States were concerned. This reserve was due to the indisposition of this Government to share in any disposal by an international congress of jurisdictional questions in remote foreign territories. The results of the conference were embodied in a formal act of the nature of an international convention, which laid down certain obligations purporting to be binding on the signatories, subject to ratification within one year. Notwithstanding the reservation under which the delegates of the United States attended, their signatures were attached to the general act in the same manner as those of the plenipotentiaries of other governments, thus making the United States appear, without reserve or qualification, as signatories to a joint international engagement imposing on the signers the conservation of the territorial integrity of distant regions where we have no established interests or control. "This Government does not, however, regard its reservation of liberty of action in the premises as at all impaired; and holding that an engagement to share in the obligation of enforcing neutrality in the remote valley of the Kongo would be an alliance whose responsibilities we are not in a position to assume, I abstain from asking the sanction of the Senate to that general act."