Guerin Remembers

In Flanders fields, where once was blood,

From battles for so few yards of mud,

I woke from such slumber deep,

And mocked the blood the havoc wreaked.

But now I show our future hope,

And enable veterans to cope,

By provoking memories of blood,

Before new battlefields can flood.

What am I?

Check Braingle.com for the answer.