Why did so many countries get dragged into world war 1 after australia declared war on serbia?

Oh goody :)
#PowerPlays
#Alliances
OK. Germany backed Austria. Austria declared War on Serbia. Serbia was backed by Russia (Not the USSR at the time) Germany then proceeded to declare war on russia. Russia had a treaty with france that stated if they were attacked, France would join in. France had a similar treaty with the UK. So France declared war on germany, germany declares war back, the UK declares war on germany. And then we have a full out european war. Only problem is that they have colonies everywhere making it a World War. 

Ithink it’s b yep lelelelel

He issued the emancipation proclamation. it started changing slavery, and eventually lead to the freedom of slaves.