This is a riveting follow-up to #21373.

With the importer's help, I went back and restored barbed wire (FENC) for missions put together before that PR. The list:

• allies-05a, Tanya's Tale (A)
  • Only two added; others were already placed.
• allies-05b & allies-05c, Tanya's Tale (B & C)
• allies-10a, Suspicion
• fall-of-greece-1-personal-war
• fall-of-greece-2-evacuation
  • I opted to make Neutral the fence's owner instead of nearby England, to make it less fiddly to break if that is the player's wish.
• siberian-conflict-3-wasteland
• soviet-01, Lesson in Blood
• soviet-09, Liability Elimination
• soviet-10, Overseer

Other maps already have the barbed wire placed by hand:

• allies-01, In the Thick of It
• allies-02, Five to One
• allies-03a & allies-03b, Dead End
  • The latter has some wire shifted to avoid a cliff corner, but all 128 bits seem to be there.
• allies-09a, Extract Kosygin
• sarin-gas-3-controlled-burn
  • The fencing here is a little different, partly to protect a new Radar Dome in the southwest corner.
• in-the-nick-of-time
• negotiations
• soviet-02a, Thin Red Line
• soviet-03, Covert Cleanup

allies-06a fencing is covered by #21401, and allies-06b will follow.

I skipped the single FENC in soviet-soldier-volkov-n-chitzkoi because it seems like a mapper's goof.

Near as I can tell, the only original TD mission with placed BARB is Hostile Takeover, which remains on the to-do list. Mousetrap is the only RA mission to feature BARB, where it's placed to resemble power coils.