That's very thoughful.  Here's part of the Sentinel's Creed for those who guard the Tomb of the Unknowns

at Arlington National Cemetery. 

I will walk my tour in humble reverence to the best of my ability.
It is he who commands the respect I protect.
His bravery that made us so proud.
Surrounded by well meaning crowds by day alone in the thoughtful peace of night,
this soldier will in honored glory rest under my eternal vigilance.