I'm making a map and was wondering...
should a diagonal connection, two territories connected by 1 point, should armies be able to move between them? is this typical?

If two territories are connected by 1 point, they shouldn't connect.

The army would have to become 1D to fit into the territory without landing in the other territories, so yeah...

Being consistent is the thing. If any diagonal connection is valid, all diagonal connections should be valid.

bloodnok says it more properly..

generally when I provide feedback based on these circumstances, I will provide situations where it is done, and it isn't done in the map, and suggest that it should be universal..