This struck me as something that the good denizens of this forum might appreciate: If WWI was a bar brawl (http://themetapicture.com/if-world-war-one-was-a-bar-fight/). I thought it was really quite good, then made the mistake of reading the comments, where some people complain that, in reducing the four-year war to a bar brawl, various aspects of the conflict got glossed over or ignored :o
One of these days I will learn to never read the comments.
Much quicker than "Oh What A Lovely War"!
Horrible Histories do a great overview of the cause of WWI.
http://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&ved=0CDIQtwIwAA&url=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DtsnH8WX1MHY&ei=_K4wUtv4NcbF7AbIvIHoCA&usg=AFQjCNHV_e-jM485Na8_UcGJzSYDbmfZeQ&sig2=iJ28glWRliF7vcNdsY0M2g&bvm=bv.52109249,d.ZGU (http://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&ved=0CDIQtwIwAA&url=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DtsnH8WX1MHY&ei=_K4wUtv4NcbF7AbIvIHoCA&usg=AFQjCNHV_e-jM485Na8_UcGJzSYDbmfZeQ&sig2=iJ28glWRliF7vcNdsY0M2g&bvm=bv.52109249,d.ZGU)
They do a great breakdown of the hitler jugend too: