<page_title> 1968 in the Vietnam War </page_title> <section_title> Year in numbers </section_title> <table> <cell> United States <col_header> Armed Force </col_header> </cell> <cell> 549,500 <col_header> Strength </col_header> </cell> </table>
US troop numbers peaked in 1968 in Vietnam at 549,500.