Navy's top officer, Adm. Jonathan Greenert, and the services' top enlisted sailor, Master Chief Petty Officer of the Navy Mike Stevens, posted orders on YouTube.

The hash tag "Go Navy Beat Army" must go viral on social media, the leaders of the naval warfare service said. Meanwhile, Army Gen. Martin Dempsey, the chairman of the Chiefs of Staff, was using hash tag "Go Army Beat Navy."

"The two services have gotten pretty creative by producing funny videos, aka spirit spots, taking jabs at each before the game," DOD News' Keving O'Brien said on his blog.

Even the Ebola mission in Liberia responded to the command. Maj. Gen Darryl Williams, a former Army football player, found time to shoot a team spirit video 

The U.S. Naval Academy's Goat will face the U.S. Military Academy's mule starting at 3 p.m., Saturday. 

Here are some of the fun 'Go Army' videos shared:

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Here are some of the fun 'Go Navy' videos shared:

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