The selective pressure is actually for shorter people as all the taller people were killed in WW1.
"taller soldiers are more likely to survive battle and that taller parents are more likely to have sons". This was based on his research of British Army records from the First World War, which showed that "surviving soldiers were on average more than one inch (3.33 cm) taller than fallen soldiers"
[1] https://en.m.wikipedia.org/wiki/Returning_soldier_effect