As for the military advantage the Germans have derived, after
nearly four years of attacks by air, it may be set down as
practically nil.  In raid after raid they missed their so-called
objectives and succeeded only in killing noncombatants.  Far
different were the aim and scope of the British air offensives
into Germany and into country occupied by German troops.  Railway
junctions, ammunition dumps, enemy billets, submarine bases,
aerodromes--these were the targets for our airmen, who scored
hits by the simple but dangerous plan of flying so low that
misses were almost out of the question. 

"Make sure of your objective, even if you have to sit upon it."
Thus is summed up, in popular parlance, the policy of the Royal
Flying Corps and Royal Naval Air Service.  And if justification
were heeded of this strict limitation of aim, it will be found in
the substantial military losses inflicted upon the enemy results
which would never have been attained had our airmen dissipated
their energies on non-military objectives for the purpose of
inspiring terror in the civil population.