British Prime Minister David Cameron has said there is “no military solution” to the threat of the self-proclaimed Islamic State, even as Cameron pushes Parliament to approve his plan to begin bombing ISIS in Syria. France, Australia, Canada, Turkey and other U.S. allies have all joined the U.S.-led bombing campaign against ISIS in Syria over the past year. British opposition leader Jeremy Corbyn is opposed to the plan, but said he would permit a “free vote,” meaning that he wouldn’t instruct lawmakers from his Labour Party how to vote. Over the weekend, thousands rallied across Britain over the weekend against the plan. Speaking Monday, Prime Minister David Cameron implored lawmakers to approve the bombing in Wednesday’s vote.

Prime Minister David Cameron: “Well, I believe there’s growing support across Parliament for the compelling case there is to answer the call from our allies, to act against ISIL in Syria and in Iraq. But let’s be clear: There is no military solution to this issue. The action we are taking is part of a broader strategy—a political strategy, a diplomatic strategy, a humanitarian strategy. And in the end, the answer to what is happening in Iraq and in Syria is the same.”

In 2013, the British Parliament rejected Cameron’s proposal to begin bombing Syria in efforts to oust Syrian President Bashar al-Assad.