A complete AP World History: Modern exam digital study and review covering all 4 College Board periods — c. 1200 to the present. Each major event, empire, trade network, revolution, and global transformation is explained with historical context, cause-and-effect analysis, and connection to the AP World key themes. No single region dominates — Africa, Asia, the Americas, Europe, and the Middle East all receive substantial coverage, reflecting the AP World History exam's genuinely global scope. T