Hi there!

As you probably realise yourself, this is a SUPER-broad question, and the answer could probably fill several books! Do you think you could narrow it down a little - it might help you to get a better answer.

For example, why are you looking for this information? Is it for a special project or just a general fascination with the 12th century (totally understandable, btw)? Are you hoping for information on just warfare between states, the crusades, or even just a list of further reading? Why the 1120s in particular? Is there something special about that decade?

Narrowing down the question will make it much easier for our users to give you the kind of response you're looking for.