What was the cause of agnes's damage?

his large amount of rain caused severe flooding throughout the region. ... Hurricane Agnes took 130 lives along its path, 113 of which were a direct result of flooding. Total damages from Hurricane Agnes amounted to about $2.1 billion (1972 USD) making it the most costly U.S. hurricane at the time.

because the vietnam war was fought in an especially brutal and untraditional way

a drastic rise in oil prices ended decades of postwar.