Because force have direction as well as strength when you combine forces you also have to specify

they were byzantines

frederick the great and the war of austrian succession. frederick william of brandenburg-prussia trained his son, frederick, to be a hardy soldier. he also declared himself king of bohemia, and maria theresa sent troops to retake bohemia. in august he led 80,000 of these men across the frontier into bohemia, his

a stronger government

the answer would more than likely a.)falling crop prices  

hope the answer is right and ,either way have a nice day.