I am a forerunner(.) I know those reading this may not know who or what we are so I will enlighten
you(them). The forerunners were (-) I say this because we will not be present when this is read (-) a race of great power
by comparison to anything in this galaxy. We were handed the Mantle of Responsibility
by(from) the Precursors}#Passive, but making it active destroys flow; maybe add some context before you say this?#. Maybe handed isn't the proper term, we took the mantle from them and drove them from this galaxy. The Mantle of Responsibility is this,"The protection of all sentient life in the galaxy"
or some
may extend that to the universe(,) but we
were only worried about local issues.
(I know you probably copy+pasted this, but please add blank lines between paragraphs; do it for my eyes, they are so bad as it is)
We held the Mantle as the
single(sole) purpose
to(of) our existence
in this world and do please note that (And) while we protected sentient life we also had to protect all other life forms needed to keep said sentients alive.
This being said we came into a problem that would plague us for a period of time and force us into making the most drastic and violent decision our race has ever made,
creating(the creation of) the Halo installations.#This sentence feels out of place, you need to add more context before it#
Before I get to the violence and (the) salvation of
whoever is(those) reading this I should start with what caused us to make the decision, the problem. It was a plague that outsmarted us
at every turn#Cliched# because we underestimated it. The flood, a parasite that infected anything with enough neural synapses and calcium to support
the parasite(it). {We thought it a mutated disease that could be destroyed by normal means of quarantine and, when it came to it, destruction}#Redundant phrasing#->{We thought we could treat it by normal means - quarantine, and, if it came to it, destruction.} (But) We acted too late to kill it, (and) it had already infected much of the galaxy(.)
and we
even had to give up
some(the) life forms in it's path to secure control and {defense}->{defend}
of the ones behind. Those we gave up were
countless(measurable?) in (their) importance to our Mantle - as all sentient life is -but those we saved were more important than those we could not.
We formed a defensive line and produced automatons, soldiers
in numbers higher than that which one could count(without number) to defend the line. We produced advanced intelligences to operate and
run the defensive(hold the line?) while we searched for a cure.
Many
proposes(proposals) were made and many experiments were run.
Ones of interest(Interesting) were those tested on humans, some were found to be immune to the flood but we could not figure out why. How could the flood
wish to destroy us
but(and) not those
whom we would pass(who would inherit) our legacy
on to? We could not figure (it) out, even after extensive testing. After many years (we) could not find an answer and our forces,
while massive in numbers
for any sentient race, were (still) too few to combat the surge of the flood
as it(that) pelted our defenses(.)
and all our attempts at destroying them
in their tracks only slowed them down. We
even attempted
as much as {forcing}->{to force} stars to go nova
even(
that only slowed them.
One answer was found; (it was not)
and while not popular,
it was(but was) agreed
as(to be) the only solution. We
must starve(d) the flood. How would you starve a parasite? By killing any and all possible hosts. This is how the Halo array came to be, it would fire a blast, ring to ring, that would destroy any life with enough neural capability to sustain the flood. To keep with the Mantle we created shield worlds and the Ark. These installations would house countless specimens, embryos, and DNA/RNA samples
to be used to reseed the galaxy
by(with) our machines. We ensured that all our machines would recognize humans as Reclaimers and allow them access to our facilities for they are the race
whom(that) shall receive the mantle next. The Halos were activated after the flood had created a sentient hive mind that convinced our defense AI to stand down and allow(ed) them to attack. I was on a shield world when
this(it) happened. I was supposed to be dead. {When the burst past by the shielding}#Don't really know what you're trying to say here, so I will guess#->{When the burst passed through the shielding} the artificial light(s)
ing gave out for a moment and the whole planet shook.
End section 1: Introduction-continue to section 2: Later Missions of Seeker of Eternal Moonlight.