It would serve as an excellent point of access to Asiatic lands for trade and diplomatic purposes. The Pakistani lands were historically subject to rather harsh treatment by the various powers around it as well, our only wish is to help the people of Pakistan and Iran by bringing modern infrastructure and ease-of-living to their lands.
Pakistan's rather meager defense force, against the Prussian blitz, is swiftly crushed at the first defensive line. The Pakistani T-80 tanks are obliterated by advancing Leopard 3 MBTs, only 2 Leopards being destroyed in the process. The Bundeswehr has been ordered to steer clear of any civilian populations unless absolutely necessary. Any actions that could be deemed as war crimes that were perpetrated by the hands of a Prussian soldier, regardless of rank, will be met with a summary field trial and execution if found guilty.