Hello Hive account@velihenrik I am glad that you like to learn about history. I am history teacher in school in my country. Maybe I can add some interesting things about World War I. I really like this period. :D

1. The total cost of WWI for all involved is an estimated $185 billion.
2. The most successful fighter of the entire war was Rittmeister von Richthofen (1892-1918). He shot down 80 planes, more than any other WWI pilot. He died after being shot down near Amiens.
3. Big Bertha was a 48-ton howitzer used by the Germans in WWI. It was named after the wife of its designer Gustav Krupp. It could fire a 2,050-lb (930-kg) shell a distance of 9.3 miles (15 km).
4. “Little Willie” was the first prototype tank in WWI. Built in 1915, it carried a crew of three and could travel as fast as 3 mph (4.8 km/h).
5. Russia mobilized 12 million troops during WWI, making it the largest army in the war. More than 3/4 were killed, wounded, or went missing in action.
6. There were over 35 million civilian and soldier casualties in WWI. Over 15 million died and 20 million were wounded.

Best from Serbia :D