Complex sentence: Promoted in January 1808 to Defense Minister to the Tsar and inspector-general of the entire infantry and artillery, he once more reorganized the army and the grading of the army staff while still in 1808 he created a publication called the "artillery periodical".
Split into simpler sentences: Promoted in January 1808 to Defense Minister to the Tsar and the inspector-general of the entire infantry and artillery, he once more reorganized the army and the grading of the army staff. In 1808 he created a publication called the "artillery periodical".