Okay, a new question…In part about hexside control and in part about mandatory shock attacking.
The AI has committed a very large force to the siege of Singapore, and it is not going to succeed. My strategy is to amphibiously land a force behind Singapore, and then move down the Malay peninsula to ultimately kill the besiegers as they lack supply (not sure this is possible against the AI, but anyway).
The hexside control question: if I attack Singapore from Johor Bahru, I would think that at that point I control the hexside between Singapore and Johor Bahru, and the AI army besieging Singapore would have no way out unless they take the hex, while I could move LCUs between the hexes at my discretion. However, until I attack Singapore from Johor Bahru, I can’t move my Singapore units to Johor Bahru, while the AI can attack me in Johor Bahru from Singapore. Is this right?
However, I know there is a mandatory shock attack when moving from Johor Bahru to Singapore. Does that apply even if I own Singapore?