Places that fought in World War 1:
- Poland: Poland was partitioned between Russia, Germany, and Austria-Hungary in the late 18th century. During World War 1, many Poles fought on both sides of the conflict, with some joining the Russian army and others joining the German and Austrian armies.
- Lithuania: Lithuania was also partitioned between Russia, Germany, and Austria-Hungary. Many Lithuanians fought on both sides of the war as well.
- The Balkans: The Balkans was a region of southeastern Europe that was the site of many conflicts in the late 19th and early 20th centuries. The Balkan Wars of 1912-1913 were a major contributing factor to the start of World War 1.
- Sinai Peninsula: The Sinai Peninsula was a part of the Ottoman Empire during World War 1. It was the site of several battles between British and Ottoman forces.
- Mesopotamia: Mesopotamia (modern-day Iraq) was also part of the Ottoman Empire during World War 1. The British fought against the Ottomans in Mesopotamia in order to secure control of the region's oil resources.
Places that did not fight in World War 1:
- Belarus: Belarus was part of the Russian Empire during World War 1, but it did not see any major battles.
- North Atlantic: The North Atlantic was not directly involved in World War 1, although the war did have an impact on shipping in the region.
- Palestine: Palestine was also part of the Ottoman Empire during World War 1, but it did not see any major battles.
