The motion was first approved in 2013 to support the international campaign against the Islamic State (IS) group, and has since been renewed annually.

But this marked the first time that the motion was extended by two years, giving President Recep Tayyip Erdogan a longer mandate to pursue campaigns against Kurdish militias in the restive region.

It also marked the first time the main opposition CHP party voted against the measure, setting it on a more isolationist course ahead of a general election due by June 2023.

"You don't tell us what it's about. You say (it will be valid) for two years and tell us to vote for it. Why?" CHP leader Kemal Kilicdaroglu asked Erdogan in an address to his party members in parliament.

The CHP party voted against the deployment of Turkish forces in Iraq in 2003, but had otherwise backed Erdogan in his various international campaigns.

The new motion allows the military to carry out cross-border operations against IS jihadists and other groups deemed by Ankara as terrorist organisations.

"The risks and threats to national security posed by ongoing conflicts in regions near Turkey's southern border are continuing to increase," the motion presented to parliament by Erdogan's ruling AKP says.

Early this month, Erdogan said Turkey was preparing to step up operations in Syria, where its forces came under attack from a Kurdish militia group supported by Washington in the fight against the IS group.

Turkey and its proxies have seized control of territory inside Syria over four military operations launched since 2016, focusing heavily on various Kurdish militias.

The militants also use their hideouts in northern Iraq as a springboard for attacks aimed at Turkish soil. The Turkish army often bombs their bases in the mountainous regions.

Ankara says it uses its right under international law to self-defence, although the operations cause strains in ties with Baghdad.