Complex sentence: Strategic counter-offensives have been recorded by military historians in many wars throughout military history, although not always known as such because they are usually described by historians in conjunction with the defensive phase, such as the Battle of Moscow.
Split into simpler sentences: Strategic counter-offensives have been recorded by military historians in many wars throughout military history. Although not always known as such, because they are usually described by historians in conjunction with the defensive phase, such as the Battle of Moscow.