The map depicts the German Spring Offensive (also known as the Kaiserschlacht or Ludendorff Offensive), a series of German military operations on the Western front between March and July 1918. Soon after the US official entry into the First World War, the German General Staff realized that this offensive was the only remaining option to decisively defeat the Entente Powers before the US Expeditionary Forces could consolidate themselves in Europe.
Own work based on:✦ Western front 1918 german.jpg by ChrisO✦ Fond de carte Tour de France-blank.svg by Sémhur✦ War Ensign of Germany (1903-1918).svg by R-41✦ Flag of France.svg by SKopp✦ Flag of the United Kingdom (3-5).svg by Stefan-Xp✦ Flag of the United States.svg by Dbenbenn, Zscout370, Jacobolus, Indolences, Technion✦ Flag of Belgium.svg by Dbenbenn and others

Derived from;

maps for feeInformation from:

Bundesarchiv Militärarchiv (Freiburg im Breisgau, Germany)
The National archives (London, UK)
The National Archives and Records Administration (College Park, Maryland, US)
Youtube Series »The Great War«
file:Mai-Angriff 1918.jpg
file:Operation Michael 1918.jpg
file:France_relief_location_map.jpg
operation-georgette-929-april-1918
operation-michael-21-march4-april-1918
Kaiserschlacht - German Spring Offensive 1918, 1:09
David Hazemali. Affiliation: University of Maribor/Univerza V Mariboru.
Goran tek-en &amp; David Hazemali