WW1 crossword puzzle

belief of maintaining a strong military
The Archduke who was assasinated
excavation in the ground, which gave soldiers shelter from enemies and protected them from enemy attacks
this weapon was first used in WW1
Used to blow up ships carrying supplies
This Gun needed 4-6 men to work it
An underground shelter for trenches.
Poison gas was first used in this battle
How many points were on Wilson's plan
Which country declared war in 1917
Beleif in being proud of your country and prepared to fight for the,
Used in trenches to protect soldiers from bullets
The country with the most soldiers
The first name of the killer of Archduke Franz Ferdinand
Which country had to face the punishment for the Treaty of Versialle
Which country had to face the punishment for the Treaty of Saint Germain
Aftr the treaty Germany wasn't allowed to have this
Where was the Gallipoli peninsula located
What advancement of weapons helped the Allies win the war
The Battle in which Germany crosses Belgium border to enter into French territory
What was Erich Ludendorff when he served in the war for Germany
What was signed at 6 am between meetings with both sides
The war ended in this month
A channel at the bottom of a trench that drains water