Gen. Mark Milley speaking during a press conference.
Gen. Mark Milley speaks at a Pentagon press conference in March.
  • Dozens of secret Pentagon documents were leaked online in recent weeks.
  • The documents largely pertain to the Ukraine war and reveal how the US spies on allies and adversaries alike.
  • Ex-military and intelligence officials say the leak is embarrassing to the US and poses a significant national security threat.

Dozens of secret documents from the Pentagon were posted online in recent weeks in what some experts say is one of the most significant intelligence leaks in decades. The classified documents detail the US's intelligence gathering capabilities and expose how the US spies on allies and adversaries alike.