Since the 1940's and the end of the War the German Army have been banned from using their weapons in Germany. Their Forces contribute to international War efforts such as those in Afghanistan but are strictly regulated in Germany. That is set to change.
The German Federal Constitutional Court has made a ruling. They has declared that, "troops can be deployed in circumstances of "catastrophic proportions" - but cannot be mobilised against demonstrators" Although there are protections in place that could change in time.
If you were not already aware though, it makes you realsie we are living in increasingly volatile times. Is that what has warranted this change?
It appears to be a toss up which "gets us first". An environmental disatser on a grand scale, a natural disaster of immense proportions or a Global War.
When Hitler took power in Germany the Armed Forces swore allegiance to HIM. They were then used for his own ends. They may have been reluctant to tie themselves to Hitler but, as is so often the case, the Army propped up the regime. Egypt is a modern prime example of this.
The Court has stressed that restrictions are still in place. After Two World Wars in which Germany was central perhaps this is right and proper. That said other countries use their military for politicial ends when it suits.
In 2006 the same Court ruled that it would be illegal for the Military to shoot down a highjacked plane in Germany. That ruling is not affected by today's news.