But that wasn't economic reasons - it was done by one side as they were trying to distract the population who were screaming for them to resign due to gross mismanagement and it was claimed back by another govt who couldn't survive another
PR disaster
"Wars are primarily done for economic reasons," is I'm afraid , a classic Marxist statement made to absolve the population for getting all fired up ("Nach Paris!" "We've got the ships, we've got the guns" etc etc)