See also International Criminal Law.
This page contains the following:
International conventions, travaux préparatoires, commentaries, national law & cases
Customary International Humanitarian Law (IHL)
Selected books, manuals, research guides, and other sources
U.S. law of war, court-martial reports & military justice
For the broadest research, it is suggested that you repeat you searches in all three databases listed below, Westlaw, Lexis+, and LLMC Digital.