Supply line questions

[FM WarB]

1) What is needed to interrupt a supply line along a river, such as the Danube?

2) For the French in Russia, where should they set first depot, and how many regions apart on that Kovno, Smolensk, Moskva road must they set other depots?

[jastaV]

1) What is needed to interrupt a supply line along a river, such as the Danube?

2) For the French in Russia, where should they set first depot, and how many regions apart on that Kovno, Smolensk, Moskva road must they set other depots?

Guess controlling both regions on the two bank of a segment of river is a good way to close enemy LOC along rivers.
I experienced that was working with AACW.

I did not try Russian Campaign yet.
Anyway I suppose you should create a contigous chain of depots, starting from French controlled Poland. Place one depot any 3-5 regions away.

[Pocus]

1. a river boat or an artillery in a fortress can do.

2. Put depots 3 regions apart.