For Wicked Wednesday, I understand inspirational pictures are often posted. I, alas, rarely use photographs to give me character ideas, though occasionally after the story is in progress, or finished, I realize the character looks like a particular person. I do use photographs a lot, though, to both see details of clothing and weapons and to just get a feel for the period, and sometimes for inspiration. I like portraits best. I wonder what the people were thinking, and what their lives were like.
Here are some pictures of real participants in World War One, which I referred to while writing
The Moonlight Mistress for Harlequin Spice.

Albert Ball, a British flying ace
An unnamed Gurkha (Nepalese) soldier, who served in the British Army

Sar Tinder from Senegal, serving with the French

More to come....