Final answer:
Military units within the GCE, ACE, and LCE are attached to a MEU for a set period during their operational cycle, which has historically been subject to change based on operational demands. The old National Guard training schedule has also evolved with increased requirements as suggested by changes post-Iraq War.
Step-by-step explanation:
The question pertains to the duration that units comprising the Ground Combat Element (GCE), Air Combat Element (ACE), and Logistics Combat Element (LCE) are attached or "chopped" to a Marine Expeditionary Unit (MEU) after each scheduled deployment. This concept is related to the operational cycle of military units, specifically within the United States Marine Corps.
While the question does not explicitly provide the exact number of months for the typical attachment period to a MEU, based on historical practices and the context provided, it suggests a relationship between operational demands and the rotation patterns of the military units during deployments.
The traditional National Guard slogan of "One weekend a month, two weeks a year" has become somewhat outdated, especially considering the increased operational tempo experienced during the Iraq War. Accordingly, the annual drill requirement has changed, with the Army's top general in July 2012 stating the intention to increase it to potentially up to seven weeks per year.