Answer
Beginning with the premise that military and diplomatic history are inextricably linked, Andreas Hillgruber's scholarship delved into the complex interplay between these two aspects. His works emphasized how military strategies were shaped by diplomatic considerations, and conversely, how diplomatic negotiations were influenced by military realities. By analyzing these interconnected dynamics, Hillgruber provided a nuanced understanding of historical events, highlighting the reciprocal relationship between military power and diplomatic maneuvering.