World War One.
Caused by assassination of Franz ferdianad.
Russia s power increasing.
Germany disliked this happening. Felt threatened.
Declared war on Russia.
Austria Hungary having trouble taking over Serbia and Germany stepped in to help.
germany encouraged A-U To threaten serbia.
A-U Accepted the help from Germany only on condition that they helped if Russia got involved.
Germany agreed on this as they didn't like the power held by Russia.
Germany came up with the schleiffen plan.
There was lots of rivalry between alliances.
Lots of causes not just confined to one single cause which led straight to war.
Britain launched first dreadnoughts. (Battle Ships) major fire power.
france and germanys armies doubling