<page_title> History of the Swiss Air Force </page_title> <section_title> Previous aircraft </section_title> <table> <cell> Nieuport 23 <col_header> Aircraft </col_header> </cell> <cell> France <col_header> Origin </col_header> </cell> <cell> 23 C.1 <col_header> Version(s) </col_header> </cell> <cell> 5 <col_header> Number </col_header> </cell> <cell> 1917 <col_header> Entered service </col_header> </cell> </table>
In 1917, five Nieuport 23 C.1 planes were acquired from France.