The Turkish government sought a mandate from Parliament on Tuesday to expand cross-border military operations into Iraq and Syria, signaling that it will play a more active role in a United States-led international military campaign to combat Islamic State militants.

Parliament will vote this week on a comprehensive motion that would authorize Turkish troops to make incursions into Syria and Iraq, and allow foreign military forces to use Turkish military bases, Deputy Prime Minister Bulent Arinc said after a cabinet meeting on Tuesday.

“We have worked out and prepared a document uniting two separate motions on Iraq and Syria, enabling all necessary measures at one time, so as to respond to all threats and risks,” Mr. Arinc said. The new measure is an extension of the current law, which will expire in a matter of days.

Until now, Turkey, a NATO member that shares a 560-mile border with Syria, has hesitated to take an active military role at the front lines of the battle against the Islamic State, which is also known as ISIS. The government fears strengthening its staunch opponent, President Bashar al-Assad of Syria, as well as Kurdish separatists in southeastern Turkey.