Dom's Crossword [WW1 Edition]

2. Largest offensive of the Eastern (Russian) Front
3. First extremely lethal gas used in the war
6. End of the war
8. Two large wars in the ____ peninsula involving the Ottoman Empire, Serbia, Greece, Bulgaria, and Romania are called what?
10. Nation that invented the tank
12. Last name of the head of the British navy at the time that would later become one of the nations most respected prime ministers
14. Empire that started the war
18. Only major naval battle of the war is named the 'Battle of _______'
21. Year of the Russian Revolution
22. Nation that joined the Entente (allies) to gain the region of Transylvania
23. The name for the German's new kind of submarine
24. Name for the war before WW2 and they started calling it WW1

1. The barren wasteland between two opposing trenches
4. Start of the war
5. Last Tsar of the Russian Empire
7. Type of defense that had soldiers dig into the ground
9. Nickname for the American troops during the war
11. Ally to Germany/Austria-Hungary that later joined the Entente (France/UK/Russia)
13. Nation with the largest army during the war
15. Largest battle of the Western Front
16. Austria-Hungary invaded Serbia after their military did what?
17. Word for a German/Prussian Emperor
19. Nation that lost the highest percentage of their population
20. Britain joined the war after Germany invaded what neutral country?