How do I complete the siege damage and conquest objectives in the campaign?

A big chunk of campaign objectives revolves around seats and conquests: dealing siege damage, conquering castles, capitals, even King's Landing.

To clear them efficiently:

• Level the Siege Precision research (+3%/level, up to +27%) to hit structures harder.
• Build a siege-type army or use dragons with good siege affinity (Crimson, Kalspire and Zivern are siege-green on Adel's roster).
• Damage accumulates across waves: a defender never heals, so chain armies onto the same target until it falls.

Coordination: big targets (capitals, King's Landing) usually need the whole alliance. They're worth enormous points and objectives for both the campaign and the siege events. Go for them as a group.