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In page Austria-Hungary:

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Austria had passed the "Habsburg Law", which both dethroned the Habsburgs and banished all Habsburgs from Austrian territory. While Karl was banned from ever returning to Austria again, other Habsburgs could return if they gave up all claims to the defunct throne. In March and again in October 1921, ill-prepared attempts by Karl to regain the throne in Budapest collapsed. The initially wavering Horthy, after receiving threats of intervention from the Allied Powers and the Little Entente, refused his cooperation. Soon afterward, the Hungarian government nullified the Pragmatic Sanction, effectively dethroning the Habsburgs. Subsequently, the British took custody of Karl and removed him and his family to the Portuguese island of Madeira, where he died the following year.[citation needed]