Who was Qassem Soleimani, the Iranian General US killed?

Soleimani was the top commander of Iran's elite Quds Force for the Islamic Revolutionary Guard Corps (IRGC).

He oversaw covert operations overseas and also backed Iraqi Shi'ite groups in the war against Islamic State.

He was regarded as the mastermind of Iran's military strategy, expanding Islamic resistance across the Middle East.

He was viewed as a deadly adversary to the US and its allies.

Soleimani was born into an agricultural family in Iran's Rabor on March 11, 1957.

At age 13, he started a construction job in Kerman to help his father repay some loans.

During the 1979 Iranian Revolution to overthrow the Shah—Mohammad Reza Pahlavi—Soleimani organized demonstrations against the ruler.

Initially a volunteer in the IRGC, Soleimani rose through the ranks during the Iran-Iraq War in 1980.

It was in 1998 that Soleimani was made the chief of the Quds Force by Iran's Supreme Leader Ayatollah Ali Khamenei.

As head of the Quds Force, Soleimani helped Iran strengthen diplomatic ties with Hezbollah in Lebanon, the Bashar al-Assad-led government in Syria, and the Shi'ite militia groups in Iraq.

The alliances came at a time when Iran's economy crippled under US sanctions.

Soleimani once worked closely with the US, after the infamous 9/11 attacks.

Following 9/11, the US came in touch with Soleimani, a man with immense regional clout, to target the al-Qaeda and Taliban.

His intelligence inputs helped the US-backed government take charge in Afghanistan and the al-Qaeda terrorist Osama bin Laden—who masterminded 9/11—fled to Pakistan, where he was killed by US commandos in 2011.

However, the Iran-US did not remain cordial as ex-US President George Bush blamed Soleimani for the deaths of hundreds of US soldiers in the Iraq War.

When the civil war between Sunni and Shi'ite militants peaked in 2007 in Iraq, Soleimani supplied Shi'ite militants with weapons, the US said.

Earlier this year in April, the US designated IRGC and Quds Forces as terrorist outfits.

Nonetheless, Soleimani's popularity surged in Iran after he was made the face of Iran's intervention in the Syrian conflict from 2013.

His direct involvement in top-level talks over the formation of Iraq's government only helped his popularity, as some Iranians even pushed for him to step into domestic politics.

Soleimani quickly became a celebrity of sorts.

Despite his popularity in Iran, his support to the Shi'ite militants continued to irk the US.

Soleimani backed the Iraqi Shia militant group Kata'ib Hezbollah even as the organization attacked an Iraqi military compound near Kirkuk, killing a US defense contractor.

Last week, the US launched airstrikes targeting Hezbollah brigades, which triggered an attack on the US Embassy in Baghdad by protestors.