While the Austria-Hungary Empire is commonly called the Dual Monarchy, it's closer to a combination of various states in terms of politics, economy, and ethnicity.
Nevertheless, if we strip away all the small numbers and divide it into just two, we can split it into the Kingdom of Hungary with 42% of the population and the Austrian Empire with 58%.
So did the Hungarian army and Austrian army recruit exactly according to this population ratio and fight as one body? That wasn't the case.
When the constituent states of the Dual Monarchy were steeped in nationalism and complaints, Austria, which led them, had quite a lot of grievances piled up as well.
"Damn it, why do only we have to die?"
"Only we get drafted, only we do labor, only we die, and they call this the same country, a 'Dual' Monarchy?"
"Do only we want to win? Are only we at war?"
Most of the Dual Monarchy's army was being handled by Austria.
