Why did Germany declare war on Russia?

Related questions

1. Who won the Operation Barbarossa?
2. What happened to German POWs after Stalingrad?
3. How many German soldiers died in Russia?
4. How many German soldiers died in Stalingrad?
5. What was the deadliest day in history?
6. Who wins Operation Barbarossa?
7. How many died in Operation Barbarossa?
8. When did France fall?
9. Why was Operation Barbarossa so significant?
10. How many died on the Eastern Front?

Tags

1. #violation
2. #german
3. #europe
4. #britain
5. #support
6. #conflict
7. #neutrality
8. #serbia
9. #empire
10. #domination
11. #british
12. #brought
13. #france
14. #august
15. #declared
16. #belgian
17. #russia
18. #fears
19. #germany