Scottish succession as a border-security crisis

Edward's Scottish wars extend the same stability problem that shaped his policy in Wales. Marriage between Margaret of Norway and Edward's heir was meant to bind the kingdoms and reduce costly border raiding. Margaret's death at seven instead leaves about thirteen succession claimants and removes the family relationship on which Edward had relied. Asked to arbitrate, Edward demands formal recognition of English rights that he had not pressed against his brother-in-law Alexander III. The resulting argument over precedent and senior kingship helps turn arbitration into a claim of control. The comparison with Wales closes the section: Edward again reaches for castles and occupation, but Scotland does not give him the same time or favorable conditions.