The Second School War (French: Deuxième guerre scolaire, Dutch: Tweede schoolstrijd) was a political crisis in Belgium over the issue of religion in education.
After victory in the 1950 elections, a Christian Social Party (PSC-CVP) majority government came to power in Belgium for the first time since the end of World War II.
These measures were perceived by the traditionally-anticlerical Liberals and Socialists as a "declaration of war" on the traditionally contentious issue of religion in education.
The new Education Minister, Leo Collard, immediately set out to reverse the measures taken by Harmel, founding a large number of secular schools and only permitting the instatement of teachers with a diploma, which forced many unqualified priests out of the profession.
A compromise was eventually reached by the following government (a Catholic minority led by Gaston Eyskens) and the War was concluded by an agreement, known as the School Pact, on 6 November 1958.