Imperial Struggle

No — Minor Actions may not be used to remove opposing flags or Squadrons, except if the space contains a Conflict marker (which does allow flag removal with a Minor Action); see 5.3.2 (p.11) and the Tiruchirappalli example (p.12–13).

Naval spaces are controlled only by placing a Squadron (not a flag), and a controlled space can never contain more than one flag total while a Naval space can have only one Squadron total (3.2.4 and 3.2.7, p.5).

Conflict markers are removed at the end of Wars in which they contributed strength, whenever their space changes control (to or from controlled), or when a player pays to remove them with Military Action Points (see 3.8.2, p.8; removal cost and procedure in 5.6.2, p.13).

You must play an Event (if you choose to) before resolving any actions on the selected Investment tile; Event effects (and any AP they grant) are resolved first or treated as a separate Major Action as specified (5.2 and 5.3 notes, p.11).

You may not voluntarily take Debt that would raise your Current Debt above your Debt Limit; if you are forced to take Debt and cannot take the full amount due to the limit, each Debt not taken awards 1 VP to your opponent (6.1–6.3, p.14).

Yes — to shift a Market it must be connected to a Territory, Fort, or Naval space you control, or to another Market you control that is not Isolated and did not change control this Action Round; an Isolated Market is one that cannot trace a chain of friendly-flagged Markets free of Conflict markers to a controlled Territory/Fort/Naval space at the start of the Action Round (5.4.1, p.12).