The discovery of the Tudeh Party's military organization.

September 11, 1954, is known in Iran's calendar narratives as the day of the discovery of the Tudeh Party's military organization, but the affair did not begin exactly on that day.

Following the arrest of Abolhassan Abbasi on August 12, 1954, security agents obtained information about the Tudeh Party's military network, and the arrest of officers associated with this organization gradually expanded.

For this reason, it is more accurate to say that September 11, 1954, was one of the important days in the process of discovering and suppressing the Tudeh Party's military organization, rather than that the entire organization was discovered on that very day.