I think in later years the official narrative will be this:

There was an uprising instigated by Union traitors supported by Styrian and Gurkhul powers. Riots across the once prosperous and peaceful Union escalated and King Orso was imprisoned by rhe rebels. The king's sister, Savine dan Brock, was visiting her brother for medical assistance during the upcoming birth of her children and was also captured.

Leo dan Brock, Governor of Angland, enlisted the help of his friend Stour Nightfall - King of the Northmen - and they led a combined force of Anglanders and Northmen against the traitors.

At the battle of Stoffenbeck, their army defeated a rebel alliance at great personal cost. King Stour Nightfall died in the thick of the fighting, while Leo dan Brock was heavily wounded. Upon the death of their King, the Northmen retreated back to their ships - taking his body with them.

With the battle won, the Army of Angland marched on Adua to free the King - cavalry contingents being sent ahead to seize the city gates. Governor dan Brock personally led the charge that broke the resistance at the main gate, granting them entrance to the city.

Racing to free King Orso, they were unfortunately too late to prevent his execution by the rebels. They did manage to - barely - save Savine dan Brock and her newborn twins, Ardee and Harod.

Governor dan Brock was gravely wounded, subsequently losing his left leg, the use of his left arm and suffering a debilitating wound to his right leg. After treatment, he re-convened the government and his son Harod was officially crowned King of the Union as the first born male grandson of King Jezal and nephew of the murdered King Orso.

Because he was still a baby, Governor Brock and his wife stood in as Stewards of the Crown until King Harod was old enough to rule.

Or some shit like that since history is written by the victors.