A Rondeau Wrote.

A rondeau's wrote with just three rhymes
three verses, total, fifteen lines,
the first line's first four syllables
echo, to fill the ninth line full
this first verse done, I'm doing fine...
 
As the ninth line nears, here's a sign
eight syllables per, by design,  
the third rhymes here! The ninth line pulls,
a rondeau wrote...
 
There's a famous one (it ain't mine)
it's been around for quite some time,
" In Flanders Fields " where men got culled
where poppies grow, their sun was dulled,
as this ends,  I think I've defined,
A Rondeau, wrote.