Involved Nations WWI

When in 1918 the exhausted combatants from around the world finally laid down their arms, millions of soldiers were dead or missing: with them vanished almost an entire generation. Uncounted civilians were dead or homeless. The maps of five continents were redrawn as countries disappeared or were replaced by new ones that rose from the ashes of the old. Almost overnight, several empires that had taken centuries to build either disintegrated or were shaken to their foundations.