A quick search in NoveList turned up a few results:
The Advocate by Bill Mesce Jr.: "Searching for the truth behind the mysterious crash of an American P-47 Thunderbolt in 1943, Judge Advocate lawyer Harry Voss must weave through a world of secretive soldiers and powerful, political men who may kill to keep the truth hidden."
Traitor: a Novel by Ralph Peters: "While Congress debates the funding for a controversial and costly state-of-the-art jet fighter, a deadly terrorist bomb levels a French aircraft research facility, and Lieutenant Colonel John Reynolds finds himself caught up in a web of greed, honor, passion, and high-level intrigue."
Proud Legions by John Antal: "Lt. Col. Johnny Rodriguez's troopers are prepared for the challenge when North Korea decides to march south on Seoul, but the million-man army heading toward them leaves them facing overwhelming odds."
These novels are apart from Clancy's stuff, which, from what I hear, is more about counterterrorism than the army itself.