He added that it should be "solemnly covenanted that if any nations refused to abide by the decisions of such a court, then others draw the sword in behalf of peace and justice."[320][321] In 1915 he outlined this plan more specifically, urging that nations guarantee their entire military force, if necessary, against any nation that refused to carry out arbitration decrees or violated rights of other nations. Though Roosevelt had some concerns about the impact on United States sovereignty, he insisted that such a league would only work if the United States participated as one of the "joint guarantors".[322] Roosevelt referred to this plan in a 1918 speech as "the most feasible for...a league of nations."[323][324] By this time Wilson was strongly hostile to Roosevelt and Lodge, and developed his own plans for a rather different League of Nations. It became reality along Wilson's lines at the Paris Peace Conference in 1919. Roosevelt denounced Wilson's approach but died before it was adopted at Paris. However, Lodge was willing to accept it with serious reservations. 