The Cold Six Thousand begins concurrently with the end of American Tabloid and covers a slightly longer period, culminating in the assassinations of Martin Luther King Jr. and Robert F. Kennedy in 1968.
Blood's a Rover spans the years 1968 to 1973, encompassing the Vietnam War, the death of J. Edgar Hoover, the Black Power movement, the Mob's attempt to build casinos in the Dominican Republic, and the Nixon administration.
Here's the lineage: America was founded on a bedrock of racism, slaughter of the indigenous people, slavery, religious lunacy ... and nations are never innocent.
What you have in The Cold Six Thousand — which covers the years '63 to '68 — is that last gasp of pre-public-accountability America where the anti-communist mandate justified virtually any action.
[1]Real people who appear as characters in the trilogy include: John F. Kennedy, Robert F. Kennedy, Martin Luther King Jr., J. Edgar Hoover, Richard M. Nixon, Joseph P. Kennedy Sr., Jimmy Hoffa, Guy Banister, Howard Hughes, Sam Giancana, Carlos Marcello, Johnny Roselli, Jack Ruby, Chuck Rogers, Peter Lawford, Lyndon B. Johnson, Lee Harvey Oswald, J. D. Tippit, Lee Bowers, Betty McDonald,[2][3] Jim Koethe,[4] Jack Zangetty,[5][6] Hank Killiam,[7] Joseph Milteer,[8][9] Bayard Rustin, James Earl Ray, Sirhan Sirhan, Sal Mineo, Moe Dalitz, Santo Trafficante Jr., Bebe Rebozo, E. Howard Hunt, Fred Otash, Sonny Liston, Thomas Reddin, and Joaquín Balaguer.