 This period can also be subdivided in following periods : Isabella II 1844 - 1854: The Moderate decade (Década moderada), a period of conservative retrenchment under the Moderate Party after the passing of the progressive constitution of 1837. 1854 - 1856: The Progressive two years (Bienio progresista), following the unrest of the Vicalvarada, as the Progressive Party attempted to implement the reformist Manzanares manifesto.
<fluency>  This period can also be subdivided in following periods : Isabella II 1844 - 1854: The Moderate decade (Década moderada), a period of conservative retrenchment under the Moderate Party after the passing of the progressive constitution of 1837. 1854 - 1856: The Progressive two years (Bienio progresista), following the unrest of the Vicalvarada, as the Progressive Party attempted to implement the reformist Manzanares manifesto.
 This period can also be subdivided in following periods : Isabella II 1844 - 1854: The Moderate decade (Década moderada), a period of conservative retrenchment under the Moderate Party after the passing of the progressive constitution of 1837. 1854 - 1856: The progressive two years (Bienio progresista), following the unrest of the Vicalvarada, as the Progressive Party attempted to implement the reformist Manzanares manifesto.