"What Bradley Manning revealed:
1.) Official policy of US Govt to ignore torture in Iraq.
2.) Child Abuse and Human trafficking by US security contractors.
3.) Guantanamo prison holds mostly innocent people.
4.) The official tally of civilian deaths in Iraq and Afghanistan.
5.) U.S. Military withheld info about indiscriminate killing of Journalists & Iraqi civilians.
6.) US State Department backed corporate opposition to minimum wage in Haiti, in one of the poorest countries in the world.
7.) The U.S. Government had long been faking its public support for Tunisian President Ben Ali.
8.) Known Egyptian torturers received training from the FBI.
9.) State Dept authorized theft of UN Secretary General’s DNA. Credit card details, passwords etc.
10.) In 2008 Japanese and U.S. Governments had been warned about seismic threat at Fukushima.
11.) Obama Administration allowed Yemen’s President cover up secret U.S. drone bombing campaign which has killed mainly civilians including children."
Source and For background details on each of these