What were the major contributing factors to the outbreak of war in Europe in 1914?

Need on these last 2 questions on my social studies homework 5 and 6 then i’m done with the homework

As the coach of the u.s. olympic cycling team, i can state without question that the swedish and french teams were using illegal steroids. how else could they have beaten us so badly in the last competition? the u.s. team trained much harder and was much more skilled than our opponents. we only lost because a few teams cheated.

What two things did former british prime minister winston churchill affirm in his iron curtain speech?