[ORDER SOLUTION] Spanish Civil War

Sources must be 4 books, 5 scholarly articles at the least,  Essay thesis should be along the lines of: allied parties should’ve intervened in Spanish civil war instead of appeasing Hitler as the nazis used many tactics/technology that they would use in ww2 (basically discussing how nazis/italians were involved in spanish civil war and how the failure of the allied forces (britain and france) to intervene came back to bite them in the ass Essay should discuss Nazi tactics used in spanish civil war such as luftwaffe blitzkrieg artillery etc.  that they went on to use in WW2