Placements notes for Black Ops 1 (both the campaign and Zombies maps). Will do the DS and Mobile ports at a later date (since I believe those have unique missions/storys). Intel Docs are collectibles that you can find throughout each level and seeing as you also added diary entries from the past games onto the timeline, figured I'd add the Intel Docs as well.
1945
29th October
Call of Duty: Black Ops: Mission 08: "Project Nova" [Black Ops Timeline]
1948
12th August
Call of Duty: Black Ops: Mission 08: "Project Nova" (Intel Document 1) [Black Ops Timeline]
1956
25th April
Call of Duty: Black Ops: Zombies mode: "Shangri-La" [Zombies Timeline]
1959
12th August
Call of Duty: Black Ops: Mission 01: "Operation 40" (Intel Document 2) [Black Ops Timeline]
1960
1st September
Call of Duty: Black Ops: Mission 06: "The Defector" (Intel Document 3) [Black Ops Timeline]
5th September
Call of Duty: Black Ops: Mission 05: "S.O.G." (Intel Document 4) [Black Ops Timeline]
6th September
Call of Duty: Black Ops: Mission 01: "Operation 40" (Intel Document 3) [Black Ops Timeline]
5th October
Call of Duty: Black Ops: Mission 01: "Operation 40" (Intel Document 1) [Black Ops Timeline]
1961
5th March
Call of Duty: Black Ops: Mission 04: "Executive Order" (Intel Document 3) [Black Ops Timeline]
17th April
Call of Duty: Black Ops: Mission 01: "Operation 40" [Black Ops Timeline]
24th November
Call of Duty: Black Ops: Mission 04: "Executive Order" (Intel Document 2) [Black Ops Timeline]
Sometime between April 1961 to October 1963
????
Call of Duty: Black Ops: Mission 14: "Revelation" (Mason being brainwashed) [Black Ops Timeline]
Call of Duty: Black Ops: Mission 08: "Project Nova" (Reznov talking to Mason) [Black Ops Timeline]
1962
8th January
Call of Duty: Black Ops: Mission 02: "Vorkuta" (Intel Document 1) [Black Ops Timeline]
24th February
Call of Duty: Black Ops: Mission 05: "S.O.G." (Intel Document 1) [Black Ops Timeline]
7th October
Call of Duty: Black Ops: Mission 14: "Revelation" (Intel Document 1) [Black Ops Timeline]
10th October
Call of Duty: Black Ops: Mission 15: "Redemption" (Intel Document 1) [Black Ops Timeline]
1963
6th June
Call of Duty: Black Ops: Mission 04: "Executive Order" (Intel Document 1) [Black Ops Timeline]
6th October
Call of Duty: Black Ops: Mission 02: "Vorkuta" [Black Ops Timeline]
28th October
Call of Duty: Black Ops: Zombies mode: "Kino der Toten" [Zombies Timeline]
1st November
Call of Duty: Black Ops: Mission 02: "Vorkuta" (Intel Document 2) [Black Ops Timeline]
Call of Duty: Black Ops: Mission 08: "Project Nova" (Intel Document 3) [Black Ops Timeline]
6th November
Call of Duty: Black Ops: Zombies mode: "Five" [Zombies Timeline]
Call of Duty: Black Ops: Zombies mode: "Ascension" [Zombies Timeline]
10th November
Call of Duty: Black Ops: Mission 03: "U.S.D.D." [Black Ops Timeline]
17th November
Call of Duty: Black Ops: Mission 04: "Executive Order" [Black Ops Timeline]
1964
24th January
Call of Duty: Black Ops: Mission 09: "Victor Charlie" (Intel Document 1) [Black Ops Timeline]
1965
13th May
Call of Duty: Black Ops: Mission 09: "Victor Charlie" (Intel Document 2) [Black Ops Timeline]
1st September
Call of Duty: Black Ops: Mission 05: "S.O.G." (Intel Document 2) [Black Ops Timeline]
1966
15th March
Call of Duty: Black Ops: Mission 12: "Payback" (Intel Document 1) [Black Ops Timeline]
13th May
Call of Duty: Black Ops: Mission 10: "Crash Site" (Intel Document 1) [Black Ops Timeline]
6th June
Call of Duty: Black Ops: Mission 02: "Vorkuta" (Intel Document 3) [Black Ops Timeline]
19th December
Call of Duty: Black Ops: Mission 09: "Victor Charlie" (Intel Document 4) [Black Ops Timeline]
1967
8th January
Call of Duty: Black Ops: Mission 11: "WMD" (Intel Document 1) [Black Ops Timeline]
14th April
Call of Duty: Black Ops: Mission 07: "Numbers" (Intel Document 2) [Black Ops Timeline]
Call of Duty: Black Ops: Mission 11: "WMD" (Intel Document 3) [Black Ops Timeline]
20th October
Call of Duty: Black Ops: Mission 13: "Rebirth" (Intel Document 1) [Black Ops Timeline]
1968
21st January
Call of Duty: Black Ops: Mission 05: "S.O.G." [Black Ops Timeline]
23rd January
Call of Duty: Black Ops: Mission 05: "S.O.G." (Intel Document 3) [Black Ops Timeline]
29th January
Call of Duty: Black Ops: Mission 06: "The Defector" (Intel Document 2) [Black Ops Timeline]
2nd February
Call of Duty: Black Ops: Mission 06: "The Defector" [Black Ops Timeline]
7th February
Call of Duty: Black Ops: Mission 07: "Numbers" (Intel Document 1) [Black Ops Timeline]
9th February
Call of Duty: Black Ops: Mission 09: "Victor Charlie" [Black Ops Timeline]
Call of Duty: Black Ops: Mission 07: "Numbers" [Black Ops Timeline]
11th February
Call of Duty: Black Ops: Mission 10: "Crash Site" [Black Ops Timeline]
15th February
Call of Duty: Black Ops: Mission 09: "Victor Charlie" (Intel Document 3) [Black Ops Timeline]
Call of Duty: Black Ops: Mission 10: "Crash Site" (Intel Document 2) [Black Ops Timeline]
18th February
Call of Duty: Black Ops: Mission 11: "WMD" [Black Ops Timeline]
18th February
Call of Duty: Black Ops: Mission 12: "Payback" [Black Ops Timeline]
20th February
Call of Duty: Black Ops: Mission 11: "WMD" (Intel Document 2) [Black Ops Timeline]
22nd February
Call of Duty: Black Ops: Mission 08: "Project Nova" (Intel Document 2) [Black Ops Timeline]
23rd February
Call of Duty: Black Ops: Mission 13: "Rebirth" [Black Ops Timeline]
25th February
Call of Duty: Black Ops (Cinematic Cutscenes) [Black Ops Timeline]
Call of Duty: Black Ops: Mission 14: "Revelation" [Black Ops Timeline]
26th February
Call of Duty: Black Ops: Mission 15: "Redemption" [Black Ops Timeline]
2nd November
Call of Duty: Black Ops: Mission 06: "The Defector" (Intel Document 1) [Black Ops Timeline]
1969
10th June
Call of Duty: Black Ops: Mission 15: "Redemption" (Intel Document 2) [Black Ops Timeline]
196?
????
Call of Duty: Black Ops: Zombies mode: "Dead Ops Arcade" [Zombies Timeline] (Presumably non-canon since is meant to to emulate an arcade game)
1970
2nd March
Call of Duty: Black Ops: Mission 14: "Revelation" (Intel Document 2) [Black Ops Timeline]
1978
27th October
Call of Duty: Black Ops: Mission 15: "Redemption" (Intel Document 3) [Black Ops Timeline] (Possibly non-canon/retconned since Black Ops 2 and Black Ops: Cold War sees Mason and co. alive and working with the CIA)
1999
29th June
Call of Duty: Black Ops: Mission 12: "Payback" (Intel Document 2) [Black Ops Timeline]
2011
6th November
Call of Duty: Black Ops: Zombies mode: "Call of the Dead" [Zombies Timeline] (A personal favourite. I mean, who wouldn't wanna play as Freddy Krueger, Buffy, Machete and Mary Poppins Yondu Udonta fighting together as they battle zombies and a superpowered zombie George A. Romero?)
2025
13th October
Call of Duty: Black Ops: Zombies mode: "Moon" [Zombies Timeline]