OK, we are building it - and you are supposed to post here. You do not have to be a lawyer.

This is not a Charlie Dunlap thread; but he started writing about this topic in 2001. Let's start with two shorter articles; and end with his law review article from 2001.

Lawfare amid warfare 2007 (Wash Times)

Lawfare: A Decisive Element of 21st-Century Conflicts? 2009 (JFQ)

Law and Military Interventions: Preserving Humanitarian Values in 21st Conflicts 2001 (Duke)

Lawfare, in concept, is earlier - and was predicted in effect by the JAG School in 1959 - suggested as part of "Unrestricted Warfare" in 1999 as part of a larger concept - see links in this post.

Adoption of the 1977 Additional Protocal I to the GCs seems the earliest example of Lawfare at its highest level. See Rex A. Childers, THE RATIONALITY OF NONCONFORMITY: THE UNITED STATES DECISION TO REFUSE RATIFICATION OF PROTOCOL I ADDITIONAL TO THE GENEVA CONVENTIONS OF 1949 (2008), which discusses this example of Lawfare from the standpoint of national strategies.

Probably all the textbooks you need to get started.

Ready. Shoot. Aim.