Yohn’s career focused on paintings and
illustrations of military and frontier subjects. His style was set early, and his forte was accuracy of expression. At 23, in 1898, his illustrations were included in part of a touring exhibition “Story of the Revolution,” and Yohn was credited as a star of the show.
The same year the “Hero of Vincennes” was published by Lowell Thomas, and
illustrated by Yohn, F.C. Yohn was designer of a 2-cent stamp issued in 1929
to commemorate the 150th Anniversary of George Rogers Clark’s victory over
the British at Fort Sackville (now Vincennes), Indiana.