Going through my bandom recs I came up with these fics that I think might be the sort you're looking for.
- A Lovely Apparition (or, The One Where Gerard's A Crossdresser in the 1790s) by jezrana is mainly a romance but it doesn't sidestep the issues of crossdressing and homosexuality (21,720 words) - These Walls Are Built To Fall by jezrana is also mainly a romance (this one taking place vaguely in the Edwardian period) but it doesn't sidestep the class and sexuality issues (6,930 words) - Up the Line by tabula_x_rasa takes place on the Western front during the last months of WWI and it's firmly rooted in its time and place, very little prettifying (54,630 words) - The End of the Beginning by tuesdaysgone is a post WWII story about soldiers home from the war and the wives who've been living without them for so long (14,920 words)
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Going through my bandom recs I came up with these fics that I think might be the sort you're looking for.
- A Lovely Apparition (or, The One Where Gerard's A Crossdresser in the 1790s) by
- These Walls Are Built To Fall by
- Up the Line by
- The End of the Beginning by