Tactics for the Swamp (Fortress).

That's not quite right. I suggested building the Capitol AFTER the troops are established. For example, after capturing the first Utopia.

How can you capture a Utopia without a Capitol?
Under normal circumstances, capturing an Utopia takes at least three weeks of population (with acceptable losses). And building a three-week population "without a Capitol" would probably take almost a month.
I don't agree with this approach...