Infantry may advance in line and attack cavalry safely, provided its
flanks are protected. Before a long line of infantry, cavalry must
retreat, or be destroyed by its fire. In the Austrian service it is said
to be a received maxim, that horses will not stand before the steady
approach of a mass of infantry, with bayonets at the charge, but will
always retire before the infantry closes on them.
6. So, infantry _in column_, either closed in mass, or at half distance,
may attack cavalry successfully; taking care to be ready to form square,
or "column against cavalry," at the first symptom of their preparing to
charge.