Brave, skilled warriors have been carrying out daring missions from ancient times to today. But who are they? How did they become the courageous fighters you hear about on the news and in history books? What are their special skills and techniques? Learn all about history's great warriors in these exciting, fact-filled books.Core Library is the must-have line of nonfiction books for supporting the Common Core State Standards for grades 3-6.Core Library features:A wide variety of high-interest topicsWell-researched, clearly written informational textPrimary sources with accompanying questionsMultiple prompts and activities for writing, reading, and critical thinkingCharts, graphs, diagrams, timelines, and maps