The White House on Friday welcomed the decisions of several allies to join airstrikes against ISIS militants in Iraq as the coalition grows. 

Australia announced on Friday that it would send fighters and special forces troops to advise the Iraq military.

"With these deployments, Australia demonstrates its continued leadership and resolve in addressing the urgent and critical security challenges that threaten Australia, its people, and the broader international community," White House Press Secretary Josh Earnest said in a statement.

The White House also praised decisions this week from the Netherlands and Denmark to join in airstrikes and send trainers. The White House said the Netherlands is sending up to eight F-16 fighters and 130 military trainers.

Britain, France and Canada have also joined or plan to join airstrikes in Iraq. Western allies have been less willing to partake in the U.S.-led campaign while five Arab nations have joined in.

The role of Turkey, a NATO ally on the border with Syria, has been a running question. The country's parliament voted Thursday to authorize strikes in Syria and Iraq, but it remains to be seen if it will use that authorization and go ahead with strikes.

"The United States also welcomes the Turkish parliament’s strong vote recognizing ISIL as a threat to Turkey’s national security and authorizing Turkish military activity against ISIL in Iraq and Syria," Earnest said in the statement. "We look forward to working closely with the Government of Turkey to incorporate Turkey’s unique capabilities into the growing international coalition to counter ISIL."