This is in response to a couple of other threads on this topic. What I'm putting together here is a list entry into service dates for various advances as well as a listing of scenarios for the middle years period. I'm starting in Y135 because prior to that date you can almost consider general war ships as X-ships. Ideally I would like to update a couple of the scenarios and maybe add the Second Romulan-Federation War

First List of Historical Conflicts starting in 135:
Second Kzinti Federation War Y136/CL13/682
Second Romulan Federation War Y154
Second Klingon Federation War Y155/CL19/697
Four Powers War Y157/FO/607

Major Advances
Y140 Mobile Bases Deployed
Y140 SB's Deployed
Y142-146 CC's Deployed
Y148 DN's Deployed
Y155 Timeframe BP's can upgrade command rating to 9, prior no change in command rating
Y155 All Federation/Klingon Border BS's Upgraded by this point
Y157 All Exterior BS's upgraded to BATS
Y157 Single Admiral per race in effect
Y160 Repair Pods
Y161 Bases(Non Hyrdran,Non Gorn) begin to gain fighters

Important Rule Change Dates
Y155 Battle Pods can upgrade command to 9 max
Y161 Fighters begin appearing on most bases, Gorns last to deploy
MB's take 2 turns to setup prior to Y165
Supply 4 hexs prior to Y165
Drone Ships can't target anything except slow targets prior to Y165-167
Only 1 Tug/1 Convoy providing supply prior to Y165
Y165 Battle Pods Upgrade command as shown
SAF Limits prior to Y165 1 in service, only 6 hex moves
Police ship limit at 5 prior to Y165

Important Unit Changes
DDM's a majority of Federation Destroyers were built as DDM's rather then full DD's.

Ships that appeared in this period and then unconverted/didn't make it to General War
D6F
D7Z
LD5
Fed LSC Unconverted Y142

Y to National Guard Dates
Federation Y120-???
Klingon Y121-???
Rom N/A
Kzinti Y156-???
Gorn Y121-Y150
Hydran Y134-Y144
Lyran Y130-Y156

Important Middle Year Considerations
1. Y to National Guard Transition, as you can see this takes between 10 and 29 years once it has began and some powers didn't begin this transition until well after the Y-Era ended. Even the Federation shouldn't have completed this until Y140 or so.

2. What is commanding early fleets prior to Y142 for Command Cruisers or Y148 for DN's?? Not as big of deal as some have made it out to be, if you want the two additional hexes then you have to sacrifice the 2 ships. The lack of Starbase's prior too Y140 might solve this problem anyways.

3. Prior to Y140 YDK's in Starbase hexes

4. There should be at least a few border wars between Y135 and Y157 that involve races other then Federation vs. XXX. Now a lot of the time the Lyran's and Kzinti are occupied with Civil Wars but there should be room for at least some conflict.

5. Fleet sizes smaller then General War.

By John Pepper (Akula) on Monday, April 09, 2007 - 08:56 pm: Edit

Additional Notes:

Y Ships can only be upgraded to NG ships, until NG rules are published should probably just be removed from play at given rate.

6th fleet small until Y154 and grew again in Y159

Only R-Series/Fed CL's ships were upgraded across tech. Neither should be a major factor.

Number of ships destroyed is pretty limited because we know that a lot of Y ships made it to serve in future National Guard.

Some more ships that can be included
E4S
E4T
F5T

By Ryan Opel (Ryan) on Monday, April 09, 2007 - 09:12 pm: Edit

Additional Conflicts
The Hydran Liberation/Y134/CL18/696
3rd Klingon-Hydran War/Y137-41
4th Lyran-Hydran War/Y143
4th Lyran-Kzinti War/Y144-55
Gorn-Fed War/Y157
Klingon-Tholian Incidents/Y139, Y149, Y163

By John Pepper (Akula) on Monday, April 09, 2007 - 10:16 pm: Edit

Thats what I thought, I knew I was missing some. I believe that a Gorn-Fed War scenerio exists but I think its mostly a fictional take because historically the conflict was quickly resolved.

By Mike Strain (Evilmike) on Tuesday, June 26, 2007 - 09:06 pm: Edit

'2. What is commanding early fleets prior to Y142 for Command Cruisers or Y148 for DN's?? Not as big of deal as some have made it out to be, if you want the two additional hexes then you have to sacrifice the 2 ships. The lack of Starbase's prior too Y140 might solve this problem anyways.'

Refitted YDN's.

Example, C4B, in CL# I-forget.

Replaced by C6.

Fed would be a refitted YDN (using the C4B as a guideline, use 15-box engines, convert all phaser-2 to p-1, done. Does NOT use EY rules.)

Same as for other races YDN's (with the obvious exceptions of the Hydrans/Rom/Gorn...)

BTW.

'DDM's a majority of Federation Destroyers were built as DDM's rather then full DD's.'

Only if Fed player wants to. This was addenda of the worst sort.

By Chris LaRusso (Soulcatcher) on Saturday, May 19, 2012 - 09:40 am: Edit

I did this to see what rules would be in effect in 4 Powers and maybe what could be optional.

Source Rule Rule Description 4Power Notes
AO 318.200 Kxinti Pre-War Stockpile of 48 YES(timeline supports more than 3 years of peace);
Recommend 24 stockpile at start due to intermittent civil war.
FO 515.000 Flexible Carriers YES; seeFE2010
FO 439.000 Salvage YES; Range of supply is 4
CO 520.000 Special Attack Forces (SAF) YES; limit of 1 range is 6
AO 442.600 Annual Ftrs YES; Hydrans Only 4FF per turn
AO 525.313 Kzinti DDV YES; early prototype optional
AO 314.000 Raids YES; 1 Ship in Pool: 1 Raid
AO 316.000 Admirals YES; 1 Admiral
CO 313.000 Electronic Warfare YES
AO 315.000 Battle Group YES
AO 317.100 Auxilary Scouts YES
AO 317.200 EW for PDU or PGB YES
PO 320.000 Advance Raids YES; allow additional ships???
PO 320.000 Commando Raids, Raids, Blockade Runs YES; allow additional ships???
PO 320.000 Drone, Fighter-PF Raids YES
PO 424.000 Depot Level Repair Yes
PO 425.200 Conversion During Repair Yes
PO 425.300 Rapid Combat Repair Yes
FO 437.000 Two-Step Conversions YES
AO 441.100 GPGB (PDU w/o Ftrs or PFs) YES
AO 441.200 Bases w/o ftrs of PF YES
AO 441.300 Upgrading PGBs YES
AO 442.300 Transportation of Economic Points YES
AO 442.400 Hydran Treasury YES
AO 442.510 Activation of Dreadnaughts YES
AO 442.520 Nuetral Zone Accounting YES
AO 442.540 LDR YES
AO 442.550 Salvage YES
AO 442.900 Auxiliary Ship Production YES
CO 443.000 Commercial Convoys. YES
PO 448.000 Transferring Provinces Yes
PO 448.200 Annexing Provinces Yes
PO 450.200 Medium Shipyards YES
PO 450.300 Production Overrides YES
PO 450.500 Flexible Conversions YES
SO 451.000 Hospital Ships YES
CO 513.100 Aux-CVs YES
CO 513.500 Hydran Ftr Conveyer Pallet YES
CO 519.000 Monitors YES
CO 521.000 Ground Combat YES
CO 522.000 Prime Team YES
AO 525.329 Kzinti CLD YES
AO 528.000 Klingon Penal Ships YES
PO 534.000 Espionage and Sabotage Yes
PO 536.000 FDU YES
PO 537.110 Resistance Movements: YES
PO 537.120 Resistance Movements: Infiltration YES
PO 537.130 Rebelion YES
PO 537.220 Tug Rescue Mission W YES
PO 537.230 Tug Rescue Mission W Pursuit escape YES
PO 537.300 Early Warning Networks YES
PO 537.600 Tug Missions YES
SO 539.000 Special Mission Ships YES
SO 539.100 Armed Priority Transports YES
SO 539.200 Prime Team Transports YES
SO 539.500 Additional Penal Ships YES
SO 539.700 Theater Transports YES
SO 540.000 Diplomacy YES
SO 542.000 Survey Ships YES
FO 602.490 Limited War Limits YES
PO 321.000 Marine Major Generals (Optional)SIT says NO
PO 446.000 Colony Development (Optional)No, YIS on SIT doesn't allow
PO 449.000 Trade with Wyn (Optional)NO, maybe OK by agreement
PO 425.000 Planetary Repair Dock (Optional)NO

By Gary Carney (Nerroth) on Wednesday, August 21, 2019 - 01:09 pm: Edit

With the ongoing discussion of the proposed Federation Corvette design in mind, I thought it worth noting here that this ship class, if/when it appears in Star Fleet Battles and/or in Federation Commander, might be worth introducing alongside other, more recently-introduced Middle Years hulls, such as the Federation Old Heavy Cruiser (OR2.A30) from Captain's Log #38 and the Old Survey Cruiser (OR2.A44) from Captain's Log #53, plus the Kzinti Middle Years Cruiser (OR5.A19) from Captain's Log #50, in any potential future revision to the (682.0) Second Federation-Kzinti War scenario.

Also, there is a pair of Cygnan hulls in Captain's Log #24, the YCA (Y2.CA1) and YDD (Y2.CA2). While Early Years and/or National Guard ships presently lie beyond the scope of Federation and Empire, I mention them here due to their historically playing a key role in the defence of Cygnus during that conflict, according to the R-section data in the SFB Federation Master Starship Book.

So far as the "upgrade path" (or lack thereof in some cases) goes between the YCAs of one era and the CAs and GCAs of another, John Sickels' The Hidden History of the Federation's Heavy Cruisers article in Captain's Log #52 may be a valuable point of reference in this regard.

And lest I forget, the playtest Middle Years setting rules (657.0) in Captain's Log #52 might be worth leveraging here also.

By Richard B. Eitzen (Rbeitzen) on Wednesday, August 21, 2019 - 02:17 pm: Edit

You should save that post Gary. Based on previous times for expansions to come out, there's a good chance this post will get lost by then, as it seems likely that there's at least one expansion as well as several updates to existing expansions that would need to be done before a middle years project (at least I hope they are done first).

Some of those things you list are probably in the realm of national guard units which generally don't get seen in F&R, at least at this time. I could see such things being part of a middle years module if the powers that be find room for them there.

By Gary Carney (Nerroth) on Wednesday, August 21, 2019 - 11:26 pm: Edit

For what it's worth, I had previously asked if certain scenarios like that for the Second Federation-Kzinti War might might be worth considering for use in Tactical Operations, - which I suppose would depend on whether or not there might be room for the VT, OCA, OSR, and/or CAM on that product's countersheet.

If there were some viable stand-ins for the Cygnan ships which fought to defend their home world during that war, well and good. Perhaps there might be some auxiliary hulls which could be "close enough" to the YCA and YDD to make do for the time being?

By Richard B. Eitzen (Rbeitzen) on Thursday, August 22, 2019 - 12:03 am: Edit

Would be nice to have some units of that type for that scenario, but I don't know how they would deal with national guard ships. I don't think they intend to add new rules to that product of that nature (though I could be wrong). If such was the case, then I don't see that scenario being selected, similarly to the Hydran scenario where they restore their kingdom - it would require rules to be made that (I presume) do not exist yet, or at least get reworked.

Perhaps such scenarios belong in middle year or early year modules.