Dan Driscoll has announced his resignation as Army Secretary, effective after his last full day on Wednesday. He had held the post for 18 months. Driscoll broke his silence late Tuesday to make the announcement.

He did not provide a reason for his resignation. Further details about the circumstances surrounding his decision are available from the source.

The announcement brings an end to Driscoll's 18-month tenure as Army Secretary, but the reasons behind his resignation remain unclear.