A couple of questions for you guys:

1) Was there any single guiding principal behind Byzantine diplomacy in all its guises during this period?

2) During Constantine VII's reign what diplomatic events occurred? I already have Ogla/Helena's visit and conversion, peace with and the conversion of the Magyars, peace and trade rights with the Rus in 954 and also the exchanging of prisoners with Ali Saif ad-Dauda. Just need a couple more.

Just that my brother's a bit stuck with some Uni work and he needs some input ASAP, he'd appreciate anything you can give. Thanks in advance.