The attacks of both sides were supported by indirect fire.
He specialized in directing indirect fire and close air support.
The solution to this was the principle of standing off and engaging the enemy with indirect fire.
A panoramic sight was used for both indirect and direct fire.
The Marines managed to repel them using indirect fire and close air support.
They provide little protection against indirect fire that bursts in the air or among the trees, though.
With indirect fire, it may allow for other variables as well.
Among other important details this described the modern geometry for indirect fire.
It should be noted that indirect fire was not entirely new.
Its indirect fire makes it useful for shooting over obstacles and around cover.