They knew full well that any attack on Serbia would mean war with Russia - that's why they got an assurance from Germany BEFORE issuing an ultimatum to Serbia that,in the evnt of war with Russia,Germany would join in on their side.
Mobilization time for the Russian army was 2 months,and Austria-Hungary expected to be able to invade and overrun Serbia quickly,before an effective Russian army could be ready to attack them.Buy then,with their German allies beside them,they'd be able to hold off the Russians who would soon agree to a peace treaty.
So,they had no Plan B - this was evident from the fact that their initial invasion of Serbia was defeated,and they had to get help from substantial German and Bulgarian forces before eventually being able to overrun Serbia - which didn't happen until December 1915.
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They didn't have one.
They knew full well that any attack on Serbia would mean war with Russia - that's why they got an assurance from Germany BEFORE issuing an ultimatum to Serbia that,in the evnt of war with Russia,Germany would join in on their side.
Mobilization time for the Russian army was 2 months,and Austria-Hungary expected to be able to invade and overrun Serbia quickly,before an effective Russian army could be ready to attack them.Buy then,with their German allies beside them,they'd be able to hold off the Russians who would soon agree to a peace treaty.
So,they had no Plan B - this was evident from the fact that their initial invasion of Serbia was defeated,and they had to get help from substantial German and Bulgarian forces before eventually being able to overrun Serbia - which didn't happen until December 1915.
It expected hostilities to be restricted to a war against Serbia in the Balkans, without interference from Russia.
It expected German assisstance in case of a war with Russia