Unusual Caption on WWI YMCA Postcard - circa 1918

Card shows a JN-4 with pilot standing beside cockpit and caption in lower margin: "An Ace and His Eagle". No doubt given out to Air Service personnel by the YMCA with the purpose to send home.  Unfortunately this one is poor-fair with corner bumps, general wear and ink scribbles on the reverse.  Still and unusual and unique aviation card.