Palantir, the data analysis and technology firm whose contracts with the federal government are expanding, and Coinbase, a cryptocurrency firm that donated to the president’s inauguration, also sponsored the event. Oracle, a database company whose co-founder is a close friend of Mr. Trump’s, received a shout-out on Saturday as a sponsor.

The military parade commemorating the U.S. Army’s 250th anniversary and coinciding with Donald Trump’s 79th birthday will be a new spectacle for many Americans.