Slitherine

I'm playing the Kiev scenario in the Blitzkrieg campaign.
I've taken all 3 secondary objectives.
They seem to be "connected" by rail and road and supply,
but I'm not getting credit for it. Have I missed something?
Thanks for help on this!

Connected means you have to own them and there has to be a supply link to all of them and between them.

Basically the game asks you to do a large encirclement, as it happened in this battle. But you could do it differently provided you still meet the conditions.

Pls. look at the pic: if you took the three secondary objectives (yellow) they need to be connected by territory that is owned by you (grey line). Pls. note - it's not enough to just link them to your starting area in the west - they need to be linked to eachother.
You do not have to move exactly like on the pic of course, just the result matters

Thanks so much for the clarification! I did manage to "accidentally" fulfill what you described eventually.