On the highway from Tel Aviv to Jerusalem, American flags now hang alongside Israeli ones – a public sign of appreciation for US involvement in fighting Iran.

"We used to beg American administrations only to recognise a Credible Military Threat [from Iran]," said Israel's former National Security Advisor, Tzachi Hangebi, who left office four months before this war began.

"The fact that both Israel and the US are working day in, day out to diminish the capabilities of Iran, that's beyond my most utopian fantasies."

America's decision to jointly wage war on Iran opened-up possibilities for Israel to attack its old enemy in new ways – officials here talk of dividing up targets with their US counterparts according to their respective capabilities.

But this war has so far not resolved any of Israel's regional conflicts in the way its prime minister suggested it would.