“The parade involved around 6,600 soldiers from at least 11 corps and divisions nationwide, with at least 150 vehicles, 50 helicopters, warplanes, horses, mules, parachuters, celebrities, seven bands’ musical performances, several thousand civilian attendees, and a dog named Doc Holliday.[18]”

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source of image:

wc:File:Army 250 Birthday Parade (9112595).jpg

https://commons.wikimedia.org/wiki/File:Army_250_Birthday_Parade_(9112595).jpg