So, what has Europe ever done for us? Apart from...

Hunting around for some additional resources on the European Union led to a useful "Top 50"-style presentation from the Independent newspaper of the benefits of the European Union to its citizens. It's largely from a UK perspective and dates from the 50th anniversary of the Treaty of Rome (21 March 1957), but still very useful to aid understanding of some of the motivation for countries joining (and remaining within!) the EU:

http://www.independent.co.uk/news/world/europe/so-what-has-europe-ever-done-for-us-apart-from-441138.html

The general factors that have fostered European integration is a likely focus of questions in the Unit 3 paper, so this is an article well worth reading!