Handwritten Notes: "Percy McDonough / John McDonough - (father) / Marshall McDonough"

Can you identify any people, things, places, or events in this photograph? How about the time period? Or do you know where this photo came from? Email me at cbaer@vineyard.net.

Date: 1940s?
Location: * - -
People: McDonough, Percy; McDonough, John; McDonough, Marshall
Keywords: families; uniforms; soldiers; sailors; wars; military