Joachim Peiper the commander of the 1st SS Panzer Regiment "Leibstandarte Adolf Hitler" and one of the youngest colonels of his time. He rose quickly due to his decisiveness and ability to lead offensive operations in difficult conditions. His units were known for their speed, aggression, and ability to achieve local breakthroughs.

Peiper often took risks, operated on the edge of his supply capabilities, and tended to overestimate the pace of advance. During the Ardennes Offensive, his unit - known as Kampfgruppe Peiper - managed to penetrate deep into enemy rear lines, but was eventually cut off due to a lack of fuel and supplies, preventing it from influencing the overall outcome of the operation.

His unit is also associated with episodes of war crimes, which became an important part of the post-war assessment and significantly affected his reputation.