This from the WaPo:
The German army has faced a shortage of equipment for years, but the situation has recently become so precarious that some soldiers took matters into their own hands.
On Tuesday, German broadcaster ARD revealed that German soldiers tried to hide the lack of arms by replacing heavy machine guns with broomsticks during a NATO exercise last year. After painting the wooden sticks black, the German soldiers swiftly attached them to the top of armored vehicles, according to a confidential army report which was leaked to ARD.
A defense ministry spokesperson said the use of broomsticks was not a common practice, and that the decision of the involved soldiers was "hard to comprehend." According to the ministry, the armored vehicles were furthermore not supposed to be armed. It remains unclear how many broomsticks were substituted for machine guns.