Across
- 6. War: Long and Bloody Trenches in the First World War.
- 8. An underwater warship that attacks enemy ships.
- 9. Palace: site of Bolshevik takeover of power in Russia in 1917.
- 11. Rear area of military operations, source of enemy forces.
- 12. Coercive notification, no response with serious consequences.
- 13. gas: Chemical substances for war purposes, causing health damage.
- 15. Blood Pump: The Long and Deadly Battle of Verdun in World War One.
Down
- 1. Plan: A German plan before World War I for a quick victory.
- 2. Fast and surprise operations with the principles of Blitzkrieg.
- 3. Temporary cessation of hostilities.
- 4. Offensive: 1916 Russian Offensive in World War I.
- 5. Battle: The Struggle for Economic Resources in the First World War.
- 7. Day: Stock market crash of 1929, triggering the Great Depression.
- 10. Blocking enemy trade.
- 14. Armored combat vehicle, used in war conflicts.