He hasn't seen the Army-issued gear in nearly seven decades.
It went missing before he was captured by the Germans in late 1944.
The bag was discovered by a French teenager in his grandfather's house.
Kadar's name and Army serial number are still stenciled on the bag.
The 16-year-old used the info to track down the Indiana veteran.
Kadar's granddaughter tells the Post-Tribune they soon hope to have an online chat with the French teen.