No, I don't believe he would have. We have to remember, it was always the intention of the Union to maintain/restore the country as one nation. These were all Americans, fighting on home soil.
The indiscriminate nature of death by chemical weapons would have put his own troops and noncombatant civilians in as much peril as the rebel soldiers. If the wind changes direction, or the chemicals taint the wells and crops, you'd have American women and babies dying en masse.
Lincoln was not Assad, nor Saddam, or any other version of sick mideast tyrant. It sickens me to list them in the same breath.
This post was edited by Benedict Arnold at April 8, 2017 5:18 PM MDT