Jordan has vowed "to degrade and defeat" terror group ISIS to avenge the gruesome death of its fighter pilot Muath al-Kasaesbeh, who was burned to death in a cage. Here is how the two sides measure up in terms of military strength:
JORDAN
Geography: 89,342 sq km
Troops: 175,700 active frontline personnel
Land and air power: 1,321 tanks, 461 self-propelled guns, 246 aircraft and 88 multiple-launch rocket systems
Resources (in oil reserves): 165 barrels a day
Islamic State in Iraq and Syria (ISIS)
Geography: Some estimates say the group controls roughly 40,000 sq km of Iraq and Syria, others put the figure at 90,000 sq km.
Troops: 31,500 from 81 nationalities, according to CIA estimates. But observers say there could be nearly 200,000 militants
Land and air power: Nearly 40 T-55 and T-72 tanks acquired during Syrian civil war, helicopters, US-made Humvees and trucks, anti-tank missiles, AK-47s, rifles and rocket-propelled grenades. These are all either smuggled or confiscated as spoils of war in the fighting against Iraqi forces.
Resources: US$2 billion in cash and assets, financial support from wealthy individuals, oil and gas fields it controls and funds from taxation, tolls, smuggling, extortion and kidnapping.
Source: BBC, GlobalFirePower.com, Dailysabah.com, Business Insider