Finding Reliable Information on the 3rd Cavalry Regiment
The 3rd Cavalry Regiment has been around since 1874 and has more recorded history than most people realize. If you are digging into their lineage, you are going to run into a lot of conflicting details across different websites, some of which get dates wrong or conflate squadrons with the parent regiment. Here is how to actually get it right. The regiment was constituted in the regular Army on 28 July 1874 and organized at Camp Reynolds, Angel Island, California. It was initially formed from the 2nd and 10th Cavalry regiments, which is why you will sometimes see references to those units when researching early actions. The regiment saw duty during the Indian Wars in the western United States, participated in the Spanish-American War with service in Cuba, and was later reorganized as a unit during World War II. One thing most casual researchers miss is the 1987 reorganization. The 3rd Cavalry Regiment was inactivated on 1 December 1987 at Fort Lewis, Washington, and then activated again on 15 April 1996 at Fort Belvoir, Virginia, as part of the Army's modular transformation. Some older sources will list the regiment as inactive between those dates, which throws off any timeline you are trying to construct. I ran into this exact problem when compiling an order of battle for the Gulf War period. The unit was technically inactivated, but several of its squadrons continued operating under different designations, and the Army's official lineage database doesn't always reflect that continuity clearly. My workaround was to cross-reference each squadron's individual lineage separately before assembling the parent regiment's record.
The modern 3rd Cavalry Regiment comprises several squadrons with distinct histories. The 1st Squadron, 3rd Cavalry traces back to elements that served in Vietnam. The 2nd Squadron has roots in the regiment's World War II history. The 3rd Squadron was activated more recently as part of the post-1996 restructuring. Each squadron can essentially be treated as a separate research project if you need granular detail. For primary source material, the U.S. Army Center of Military History holds the official lineage documents. Their website has a section on each regiment with authorized lineages and honors. The regimental museum at Fort Cavazos (formerly Fort Hood) in Texas also maintains records, though access requires coordination through the garrison public affairs office. I found that the CMH documents are generally reliable but can be terse. If you need operational-level detail beyond what the lineage pages provide, the unit histories held at the Eisenhower Presidential Library and the National Archives in College Park, Maryland, have relevant material from the World War II and later periods. One common mistake I see is conflating the 3rd Cavalry Regiment with the 3rd Armored Cavalry Regiment. The 3rd ACR was a separate organization that served in Germany during the Cold War and saw significant action in the Gulf War before being reorganized into Brigade Combat Teams. They share a numerical designation but are not the same unit, and mixing them up in your research will immediately undercut your credibility with anyone who knows the subject.
If you want a straightforward starting point, the Army's official historical publishing site at history.army.mil has several monographs that touch on the regiment's World War II service as part of the 2nd Armored Division. Those publications are publicly accessible and don't require any special clearance or registration.
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