What are some of the historical WikiLeak revelations that are actually important to the country?

The two that everyone knows about are the Manning leaks that gave information about civilian casualties in Iraq (collateral murder) and Afghanistan (war logs), along with diplomatic cables released by Manning and Snowden that showed that the US is lying about Saudi Arabia sending out terrorists, and that they push regime change to get cheap labor.<br><br>How much and what else do we know of what our government is doing?