One great 'Female Soldier WW2 Fanfic' is 'The Unseen Heroines'. It tells the story of a group of female soldiers who were involved in secret operations. The characters are well - developed and the plot is full of twists and turns.
Some good concepts for 'ww2 soldier crossover fanfiction' include a crossover with a detective story. The WW2 soldier, with his sharp observational skills and ability to think on his feet, could assist a detective in solving a complex mystery. Another concept could be a crossover with a space exploration story. He could be part of an early space mission and his experience in handling high - stress situations during WW2 would come in handy. Also, a crossover with a zombie apocalypse setting. The soldier's combat and survival instincts would be crucial in fighting off the hordes of zombies.
The main appeal is the exploration of the untold stories. Female soldiers in WW2 had unique experiences that often got overlooked. Fanfics allow us to shine a light on them.