We Always Come Back.......
Humanitarian intervention on the part of the German army here?
It springs to mind the graffiti written by 'peacekeepers' of the same nationality in the Balkans in the 1990s - We Always Come Back.
But that incident had it's own special context, a slightly different thing for Germany than it's role in Afghanistan. To understand that requires some research into the role of Germany in the break up of the former Yugoslavia and it's historic links in the region, including during the Nazi period.
This incident in Afghanistan simply appears to expose the fact that there is nothing humane about militarism or Western expansion.