In early 1403, Rupert made diplomatic overtures to Sigismund, attempting to get him to forgo his attempt to secure the imperial crown. But Sigismund invaded Bohemia with Hungarian forces, looting and imposing heavy taxes, and persecuting the supporters of Wenceslaus. He also plundered the royal treasury to pay for his military campaigns against the supporters Rupert and of Jobst of Moravia. An armistice between Sigismund and Jobst was agreed to be in effect from 14 April until 20 May. This gave Sigismund's opponents time to prepare, and after the end of the armistice, Sigismund could make no further gains and retreated from Bohemia, reaching Bratislava on 24 July.