World War I

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Across
  1. 3. Countries expanding their territory by conquering other areas of land
  2. 6. The _________ protocol was a treaty signed in 1925 which banned use of chemical and biological weapons
  3. 7. The name of Britain's First Lord of the Admiralty
  4. 10. The area of land in between two enemy trenches
  5. 13. The name of the group who planned to assassinate Franz Ferdinand
  6. 14. The number of months the Gallipoli Campaign lasted
  7. 16. The place where Franz Ferdinand was assassinated
  8. 17. These trenches joined the first, support and reserve trenches and allowed for transfer of messages
Down
  1. 1. The alliance between Britain, France and Russia
  2. 2. Countries building up their armed forces
  3. 4. When neither side gains ground
  4. 5. The name of the British passenger ship that was sunk by a German submarine in May 1915
  5. 8. Another name for a German submarine used in WWI
  6. 9. The plan for Germany to invade France through Belgium
  7. 11. The month Britain declared war on Germany
  8. 12. A very fast and powerful type of battleship
  9. 15. A sharp weapon designed to fit on the end of a rifle gun