Following the Kunduz airstrike against two captured fuel tankers in September 2009 which killed insurgents as well as scores of civilians who had gathered to steal fuel from a Taliban-captured fuel truck, the German government finally reclassified the Afghanistan deployment in February 2010 as an "armed conflict within the parameters of international law", allowing German forces to act without risk of prosecution under German law. While the German contingent had previously relied on lightly armoured and -armed infantry mobility vehicles such as the Dingo and the Fennek armoured reconnaissance vehicle (along with unarmoured utility vehicles), heavy weapons were now brought to the area. While addressing troops in the wake of a deadly attack on April 15, 2010, then Minister of Defence Karl-Theodor zu Guttenberg announced his decision to deploy Marder infantry fighting vehicles and Pzh2000 self propelled artillery to Kunduz in order to better protect troops and "max" their "punch". The military would also go on to acquire new weapons and vehicles better suited for combat in the hot and rugged Afghan countryside. Around the same time, US forces were called into Northern Afghanistan to reinforce the German contingent and provide Regional Command North with direly needed aviation and air mobility assets. ISAF's headquarters in Kabul decided to upgrade its northern presence and placed a German Major-General in command.