Erzac -> RE: possible map code error (2/13/2020 9:53:40 AM)
Think it is working as intended. From manual: "The extra MP cost of attacking across a river is equal to 2/3 of the MP cost (truncated) for moving across a river (based on ice levels) into an EZOC"
So in this case the base attack cost is 5MP (as a non-mot. type 2 unit) + 1,333MP (for minor river crossing), which gets truncated to 1MP - adding up to 6MP total.