The book 'The Operational Art: Canadian perspectives: Context and Concepts', edited by Allan English, Daniel Gosselin, Howard Coombs and Laurence Hickey contains a number of essays that are designed to make a contribution to professional military education.

This document via the United States Air Force College provides a concise 1 1/2 page explanation of each of the levels and how they relate to one another.

In this article, via Defence-In-Depth, Kings College London, two historians Dr Huw Davies and Dr Robert Foley, outline the relevance of the operational art and operational level of war concept to the Napoleonic Wars, the First World War, and the Second World War.

Assistant Professor Dale Eikmeier of the U.S. Command and General Staff College presents a 4-part video series on the Operational Art. The videos are around 11 minutes each and are excellent value for someone tackling the Operational Art topic for the first time.

In this monograph 'Strategy and Grand Strategy: What Students and Practitioners Need to Know', via the U.S. Army War College Strategic Studies Institute, Dr. Tami Davis Biddle examines why it is so difficult to devise, implement, and sustain sound strategies and grand strategies.

A collection of four videos by Professor Sir Lawrence Freedman introduces the topic of Military Strategy. These include: 'On Why Strategy is Not What People Think it Is', 'How Will Strategy Shape the Future of War?' 'Re-Thinking Strategy' and 'Strategies Are Not Plans'.

The Australian Army is a boxer. He trains hard and looks impressive. He is presented to the crowd in a ring, in his weight class, against a near peer. The ring is one large 'white box'. The Australian Army could not fight in a street fight. He lacks the speed and agility to keep up with his allies and the cardio to manoeuvre. The Australian Army skips leg day.