They were not supermen by any means :) But yes, temperatures
were higher, by more than 1 degree (Kent and Wales were famous
for their wines, right now it's far too cold there for that for
example). And don't forget that in the Roman era, wars were
fought in summer almost exclusively, later expanding into spring
and autumn as the conscript army was replaced by a professional
one. The reasons for this are in large part practical. - winter
would not support an army on the move with food from pillaging,
hunting, and purchasing in the area it passes through, back then
there were no supply trucks and aircraft bringing in food and
supplies from the rear hundreds of miles away like we do now. -
troops were mostly farmers initially, campaigns used to start
after the fields were planted in spring and ended again before
the autumn harvest so people could be home in time to bring in
the crops. This later became less and less a factor as the army
was professionalised and troops no longer drafted from the
general populatio