Despite their differences, Piłsudski praised Sikorski in his reports, recommending him for Chief of the General Staff and Minister of War positions; only generals Kazimierz Sosnkowski and Edward Rydz-Śmigły received better evaluations from him. Sikorski was popular among many soldiers, and in politics, particularly appealing to Polish conservatives and liberals. On 1 April 1921 Sikorski replaced general Tadeusz Jordan-Rozwadowski as the chief of the Polish General Staff. Between 1922 and 1925 he held a number of high government offices. Based on his analysis, the Polish Council of Ministers adopted new foreign policy that would remain roughly unchanged until the late 1930s (preserving the "status quo" in Europe, and treating Germany and Russia as equal sources of potential threat). On 12 December 1922 he issued a general order, stressing the need for the military to stay out of politics. After the assassination of President of Poland Gabriel Narutowicz on 16 December 1922, the Marshal of the Sejm (Sejm being the Polish parliament), Maciej Rataj, appointed Sikorski prime minister. From 18 December 1922, to 26 May 1923, Sikorski served as Prime Minister and also as Minister of Internal Affairs, and was even considered as possible President. During his brief tenure as prime minister, he became popular with the Polish public and carried out essential reforms in addition to guiding the country's foreign policy in a direction that gained the approval and cooperation of the League of Nations and tightened Polish-French cooperation. He obtained recognition of Poland's eastern frontiers from the UK, France and the United States during the Conference of Ambassadors on 15 March 1923 He aided Treasury Minister Władysław Grabski's reforms aiming at curtailing inflation and reforming the currency, and supported ethnic minorities. His government nonetheless lost support in the Sejm and resigned on 26 May 1923.