Done in 30.
https://www.kcra.com/article/national-guard-allowed-back-into-capitol-complex-after-lawmakers-erupt-at-banishment-to-parking-garage/35285276#
Most of the 25,000 National Guardsmen who were brought to Washington to help secure the city through the inauguration will be sent home within five to 10 days, the Bureau said earlier Thursday. Approximately 15,000 troops will return home "as soon as possible," though the planning and process to begin moving them may take a few days.
There are some agencies requesting ongoing support, the National Guard Bureau said, and approximately 7,000 guardsmen are expected to stay through the end of the month.