Some employees failed to report to military duty altogether, while some gave themselves an extra day off.
He was a U.S. Marine Corps Reserve member for eight years.
The Navy and Marine Corps have now canceled most weekend Reserve drills.
The Marine Corps is offering some former Reserve pilots lucrative bonuses to get them back in the cockpit.
The event had originally been scheduled to take place at the president's club in Palm Beach on Nov. 16.
The move comes at a time when taxpayer and foreign-government spending at Trump properties is fueling political battles.
A Marine reservist has been charged with felony kidnapping, stalking and criminal confinement.
A Marine died over the weekend after collapsing on his 30th birthday days prior while training to deploy to Central America.
The three were killed Monday when a bomb struck their vehicle near Bagram Air Base north of Kabul.
The Marines were killed near Bagram Air Base when an improvised explosive device hit their convoy.
The campaign of President Donald Trump released a letter from 235 retired senior officers backing his re-election.
The news comes four years after the Air Force laid out initial plans for what its future fighter jets might look like.
The recent exercises were one of many the Air Force is conducting to test its Advanced Battle Management System.
A veteran of the Marine Corps and Army National Guard, he went through boot camp more than four decades ago.
Cmdr. Robert Arias is at least the third Navy commander removed from his job in recent weeks.