Pre-election support numbers for Trump in the military at large are somewhat easier to get and they seemed to be on par with the rest of the population. That doesn't mean all these Trump supporters in the military would support a coup.
If it's any reasssurance to you in that regard, the armed forces leadership
has explictly condemned the riots:
"The violent riot in Washington, D.C. on January 6, 2021 was a direct assault on the U.S. Congress, the Capitol building, and our Constitutional process," wrote the chairman of the Joint Chiefs of Staff, Army Gen. Mark Milley, along with the vice chairman and the heads of the Army, Navy, Air Force, Marine Corps, Space Force and National Guard Bureau. "We mourn the deaths of the two Capitol policemen and others connected to these unprecedented events."
"We witnessed actions inside the Capitol Building that were inconsistent with the rule of law. The rights of freedom of speech and assembly do not give anyone the right to resort to violence, sedition and insurrection," they wrote, according to a copy of the memo obtained by U.S. News. "As Service Members, we must embody the values and ideals of the Nation. We support and defend the Constitution. Any act to disrupt the Constitutional process is not only against our traditions, values and oath; it is against the law."
It's somewhat notable that all these making that statement are career military "top brass", i.e. it's not a statement from the (appointed/acting) Secretary of Defense.
Of course, one can't rule out some kind of extremist elements trying to pull off some kind of Sadat event, but that's why the FBI is investigating.