I can see the results of attacks against me in my news history, but I can't find a way to view my past attacks against other countries. Is this information accessible anywhere?

eestats.com is usually good for that type of stuff.

other simple ways? any more suggestions?

Ingame news only goes back so far. In order to see past that you would have to use an external site.

Or you can use http://www.earthgraphs.com/ if you're looking for older attack data over 72 hours old. You'll only have access to land taken/lost.

Specific attack data (army sent/losses/gains etc) however isn't saved anywhere. I'm not sure why you'd want to view it anyway since that data becomes obsolete after the attack is made.