Under Truman, full wartime censorship went into effect after six months of the Korean War
Correspondents could not criticize the Allies' conduct of the Korean War and could not send demoralizing dispatches. The correspondents were placed under jurisdiction of the Army and were subject to courtmartial. They could not quote officers or publish casualties without authorization.
There were many more rules, which are listed at the link.
The Dems and DBM are laughably stupid when they pretend that George W Bush squashes opposition to the Iraq War.
Democrats are the ones who attempt to silence their opponents.
What was different then?
Where did we go so terribly wrong?