I want to know the answer to the following question:
What field of study did Anton-Hermann Chroust specialize in?
All the background I'm provided with is that "Yves Simon (1903–61), brought to ND in the 1940s the insights of French studies in the Aristotelian-Thomistic tradition of philosophy; his own teacher Jacques Maritain (1882–73) was a frequent visitor to campus.". Is that enough to answer the question?