As a young scholar, he devotes himself to research day and night.
During the war, many students were mobilized.
He is devoted to his research as a student of economics.
生徒 refers specifically to students in primary or secondary school, whereas 学徒 is broader, more formal, and not tied to a school level.
学者 denotes an established scholar or researcher, while 学徒 can mean a mere student of a subject or a devoted follower of a discipline.
学童 means a schoolchild (usually elementary-age), while 学徒 is a formal term for a student or scholar of any age; the two are easily confused due to their similar kanji and sound.
Compound of 学 (learning, study) and 徒 (follower, disciple). The term has been used since the Meiji era to refer to students and scholars, especially in formal or ideological contexts.
During the war, many students were mobilized to work in factories.