The German Army's offensive was very swift, and within just one week after the war broke out, they captured the northern stronghold of Ústí in the Czech Region, and then advanced toward Prague, the administrative center of the Czech government.
In the traditions of Germania, the Czech Region was known as Bohemia, which has been a very important part of Germania since the Holy Roman Empire era.
For the Austrian Empire, the challenge was that, once Prague fell, the entire Czech Region would lose its will to fight completely.
As an important component of the Austrian Empire, losing Bohemia meant Austria would be left with no room for counteraction in this war.
To save Bohemia, the Imperial Government of Austria urgently dispatched the newly formed Sixth Army Group to head north to the Czech Region.
This Sixth Army Group, composed of a few veterans as junior officers and mostly new recruits, was an integrated mixed-unit Army Group.