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.

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 less than a page encyclopedia.com breaks it down for us, explaining that operational art forms a bridge between strategy, defining the political aims of a war, and tactics, fighting the battles of a war.

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 article by Brian Michelson via The Strategy Bridge discusses the idea that we are relatively accepting of warbots in roles such as reconnaissance, selective strike and logistics support, however there remains a level of discomfort with incorporating warbots into primary combat roles.

This video titled 'How do we learn from the past?' is from the 'What is War Today?' series of panel discussions presented by the University of Cambridge. The panel discussion is chaired by Professor Sir Hew Strachan who is featured across a number of our #BreakIn subjects. 

This article introduces a series of historical training packages aimed to assist battalion and company level professional development. The packages have been designed to recognise the 100th anniversary of a number of key battles while at the same time offering relevant discussion points across the spectrum of warfare.

Here via Business Insider Australia we share an email General Mattis wrote in 2003 on the importance of reading (note: copies of the same email are provided by multiple online sources).