This title examines the political upheavals, imperialist ambitions, militaristic governments, and tangled alliances that led to World War I. Compelling narrative text and well-chosen historical photographs and primary sources make this book perfect for report writing. Features include a glossary, a selected bibliography, websites, source notes, and an index, plus a timeline and essential facts. Aligned to Common Core Standards and correlated to state standards. Essential Library is an imprint of Abdo Publishing, a division of ABDO.