The correlation does not add up. You know as well as I do (or at least I hope you do), that political parties in general have very little to do with the job he was tasked with. Second of all, you should know as well as I do (or at least I hope you do), that political parties change in thought processes and platforms. Third, you should know as well as I do (or at least I hope you do), that there are frequently hawkish elements in both parties during numerous times throughout American history.
The vast majority of officer post Civil war were and are pretty much a-political. But from reading their personal mail, journals and diaries you could get a pretty good idea where they were politically. They all voted.
Pre Civil War, most officer did identify which party they belonged to, Democrat, Whig and later on Republican. You can pick up almost any personal journal of any officer who served in the Mexican-America War and they mention if they were a Whig or Democrat.
After their retirement from the service it's alot easier to discover which political party they registered with because it's public information. MacArthur, Halsey, Nimitz, Howland Smith, Eisenhower etc. were all Republicans.
FDR's Secretary of War during WW ll, Stimson was a Republican. So was FDR's Secretary of the Navy Knox.
You can read the "Patton Paper", raised a Democrat but once Woodward Wilson became President, no more Democrats for Patton.
Since post Civil War, most members of the Officers Corps were conservative. After the Vietnam War the percentages grew by bounds. The last study not a poll or survey but a study, by 2000 only 3% of the officers in the U.S. military identified themselves as being liberals.
This is why Obama lowered the academic standers for minority officer candidates hoping that more liberals would join the military and become officers.