Alsace–Lorraine

• Located in France
• Germany took it in 1871
• Reverted to French ownership in 1918 (TOV)

Major reason for anti-German feeling in France

• Alsace-Lorraine had valuable iron ore deposits, iron and steel making plants
• Taken by Germany
• France suffered economical loss

References

https://www.britannica.com/place/Alsace-Lorraine