JERUSALEM — Israel's top court unanimously ruled on Tuesday that the state must draft ultra-Orthodox Jewish men to military service, a decision that could upend Prime Minister Benjamin Netanyahu's ruling coalition.

The High Court of Justice's decision on the politically volatile issue came amid growing calls that ultra-Orthodox men, who have historically been granted sweeping exemptions from mandatory service, join the ranks as Israel wages an ongoing war against Hamas in the Gaza Strip and prepares for possible fighting in Lebanon.