well versed in letters and military technology (idiom); fine scholar and soldier
master of pen and sword
Definitions (粵典–words.hk)
語句
文學同武術都有成就；喺現代社會，通常指運動同學術都有成就，或者精通兩種以至多種技能 to be an achiever in both martial arts and in literature; in the modern sense where people do not often fight, it usually means well-rounded, having sports and academic achievements
Definitions (Wiktionary)
phrase, idiomatic
to be good at both the arts of writing and fighting/warring; to be adept with both the pen and the sword; to be well-versed in both letters and martial arts (syn.) 文武全才