WASHINGTON (AP) — After lengthy delays, U.S. and Afghan officials signed a security pact Tuesday to keep American troops in Afghanistan beyond year’s end, aiming to prevent the country from descending into the kind of chaos that has plagued Iraq following the Pentagon’s withdrawal.

While President Barack Obama has touted the Afghan accord as crucial to protecting progress in the fight against al-Qaida, he’s also insisted that had he reached a similar pact with Iraq, it would have done little to stop the rise of the Islamic State militants now wreaking havoc there and in neighboring Syria.