In his autobiography "Outlines of the Past" («Обриси минулого») Kedrowsky wrote that the family spoke mainly in Ukrainian, and that his grandfather gave him Ukrainian-language books.
Since his youth, Kedrowsky belonged to the Central Committee of the Ukrainian Socialist Revolutionary Party, and was a member of the Kherson Hromada.
While at the Zemstvo, Kedrovskiy conducted a study that revealed the loss of literacy among people whose schooling was in Russian, but who later had no access to literature written in their native Ukrainian.
The statistical work of the Ukrainian Zemstvos became the basis of a bill on the need to teach children in their native language which was introduced in the Fourth State Duma, but which did not pass due to the outbreak of World War I.
Every summer during 1912–1914 Kedrowsky had the responsibility of organizing 6-week general education courses for teachers at rural schools in the Kherson gubernia.
Under the guidance of members of the Kherson Hromada, Kedrowsky structured the courses in a way that introduced about five hundred teachers to the basics of Ukrainian Studies.
This had to be done carefully, however, because the curricula and lecturers had to be confirmed by the Imperial Ministry of Education, whose representatives were instructed to ensure that there was no anti-Russian "sedition".
From July 1 to November 1, 1915 he attended the Odesa Military Cadet School, which he graduated at the top of his class and received the rank of praporshchik.
From December 1, 1916 to June 15, 1917 he served as a gunnery commander in the Caucasian Native Mounted Division, which fought on the Galician and Rumanian fronts against Austrian, German, and Ottoman troops.
The Congress approved the creation of a Ukrainian General Military Committee as part of the Central Council of Ukraine.
In late August 1917 the Russian Provisional Government began to limit the powers of the Ukrainian Central Council.
In November, 1918, as Pavlo Skoropadskyi's Hetmanate was collapsing, Kedrowsky had an emergency meeting with Yevhen Konovalets and Fedir Chernyk of the Sich Riflemen.
[1] In early 1919 he was the military attaché of the UNR to the Ottoman Empire, and served as chairman of the commission investigating the "Oskilko Affair".
His investigatory trips to the front left him so disappointed that he proposed the formation of an Army agency responsible for restoring order.
Katherine was a graduate of City College, and was active participant in the Ukrainian-American community, being a charter member and treasurer of the Ukrainian National Women's League of America.