The web search results mention that the King and Queen are expected to have a 'military ceremonial review' [web_search] and that the visit is a 'state visit' [web_search]. However, none of the provided evidence explicitly states that a 'detailed schedule released by the White House' confirms a 'historic first military review' as a definite event. The information is suggestive but not fully corroborated as a scheduled fact from the White House.

The web search results contain multiple references to Trump and the royal couple meeting or welcoming each other [web_search], suggesting a planned visit. However, none of the evidence explicitly confirms the specific dates ('Monday through Thursday') or that the schedule was released by a 'West Wing release' detailing this duration.

The details regarding the specific numbers (300 US Service members, nearly 500 members from all six military branches) and the designation as a 'historic first' are only present in the context of the web search results, and no other source corroborates these exact figures or the specific nature of the inspection.

The specific combination of features—featuring the US Army Fife and Drum Corps AND being watched by VIPs from the Blue Room—is detailed in the context of the web search results, but this specific combination is not independently corroborated by other sources provided.

The claim lists three specific components of the delegation (American military families, UK representatives, and students from the British International School of Washington). While some web searches mention educational events involving students and the UK [web_search], the inclusion of all three specific groups together in the 'official US delegation' is only presented in the context of the web search results.

The sequence of events—signing the guest book followed by a bilateral meeting between Trump and the King—is detailed in the context of the web search results, but this specific sequence is not confirmed by multiple independent sources.