1. The War At Sea
Canada in World War One

2. The War At Sea
Britain began a naval blockade of Germany at the start of the war
Germany responded with ‘wolf packs’ of U-boats, which hunted Br. Battle and supply ships
1917: Germany began ‘unrestricted submarine warfare’, meaning they would sink any allied or neutral ship in their way (including passenger ships) to Britain

3. The War At Sea

4. The War At Sea

5. The War At Sea
Some American ships, and the Br. Lusitania (carrying many Americans) were sunk; brought USA into the war
Allies lost 5408 ships, Germans lost 178 U-boats

6. The War At Sea
Cdn and (later) Am ships kept Br supplied; sailed in convoys
Destroyers escorted merchant ships travelling in groups
Underwater mines were also used to protect shipping routes
1910: Cdn navy started with Halifax as home port

7. The War At Sea

8. The War At Sea The Halifax explosion
Dec 6, 1917, 2 allied ships, the Imo and the Mont Blanc collided in Halifax harbour
Mont Blanc was carrying 2400 tonnes of high explosives

9. The War At Sea created largest explosion in history until Hiroshima
Halifax was flattened; ships were thrown out of the harbour
1630 killed, 9000 injured, 6000 homeless

10. The War At Sea

11. The War At Sea

12. The War At Sea