Ms. Priovolos

The image below represents a major conflict that served to shape the twentieth century.  Can you guess which war it was?  Hint:  This war ended 100 years ago. 
Italian Postcard
Source:  Bowman Gray Collection, Rare Book Collection, University of North Carolina at Chapel Hill
 PeriodClass Room 
 A Prep Period 703
BWH  Library Classroom
    C      WH Library Classroom
 D WAH Library Classroom
 E Prep Period 703
 FWH 715

Extra help is available most afternoons in Room 703.