As part of its ongoing Force Design modernization effort, the U.S. Marine Corps will reduce the size of its infantry battalions from approximately 900 to just over 800 by fall 2023. The restructuring, inspired by the Infantry Battalion Experiment, also includes an enhancement of medical and reconnaissance capabilities, along with the addition of loitering munitions. 

Key Points: 

1. The Infantry Battalion Experiment, initiated in 2020, aimed to develop smaller but more versatile infantry battalions capable of operating in distributed environments.
2. The restructuring aims to prepare the Marine Corps for potential operations in the Pacific and other regions, as stated by Commandant Gen. David Berger.
3. During the first phase of the Infantry Battalion Experiment, various battalion configurations were tested, including one with as few as 735 Marines. This size was found to be too small, leading to an adjustment to 811 Marines.
4. In addition to size changes, the reconfigured battalions will have increased medical and reconnaissance capabilities and will be equipped with loitering munitions.
5. The new battalion structure of 811 Marines is to be implemented across all active and reserve component infantry units by September 1, according to the Force Design update.

Source: https://www.defenseone.com/policy/2023/06/marines-will-restructure-its-infantry-battalions-september/387102/