Narváez ended the sale of church lands promoted by the "progresistas". This put him into a difficult situation, as the "progresistas" had had some progress in improving Spain's financial situation through those programs. The Carlist War, the excesses of Maria Cristina's regency, and the difficulties of the Espartero government left the finances in a terrible situation. Narváez entrusted the finances to the minister Alejandro Mon, who embarked on an aggressive program to restore solvency to Spain's finances; in this he was remarkably successful, reforming the tax system which had been badly neglected since the reign of Charles IV. With its finances more in order, the government was able to rebuild the military and, in the 1850s and 1860s, embark on successful infrastructure improvements and campaigns in Africa that are often cited as the most productive aspects of Isabella's reign.