Timeline of Yemeni missiles, drone attacks inside Saudi Arabia.

For more than four years, Yemen’s army and allied popular forces — led by the Houthi Ansarullah movement — have been defending the country against a devastating Saudi-led military campaign meant to reinstate a former Riyadh-friendly government.

The war has so far claimed over 91,000 lives and taken a heavy toll on Yemen’s infrastructure, plunging the Arabian Peninsula’s already poorest nation into “the world’s worst humanitarian crisis.”

However, despite having the West’s strong logistical support, the Saudi regime and its partners in crime have failed to make the Yemeni people submit to the language of force, prompting them, instead, to join forces — under Ansarullah’s auspices — in boosting Yemen’s defense capabilities and responding to Riyadh’s acts of aggression.

In recent months, the Yemeni army has stepped up counter-attacks — involving domestically-built drones and missiles — on numerous positions on Saudi soil before showing off a new level of deterrent power on Saturday by targeting Aramco, the heart of Saudi Arabia’s oil industry, in a game-changing drone operation that halved the kingdom’s oil and gas output.

The following is a timeline of such retaliatory raids on targets inside Saudi Arabia staring from May 14 — when the Yemenis carried out a major drone strike on Aramco facilities.

• June 12, 2019: The Saudi-led coalition confirms a retaliatory missile strike by Yemeni armed forces on the Abha International Airport in the kingdom’s southwestern Asir region.

The coalition says a Yemeni missile hit the airport’s arrivals hall, causing material damage.

• June 17, 2019: The Ansarullah movement and its allied forces target an airport in Abha.
• June 20, 2019: Yemeni forces attack a power plant in Jizan Province southwest of the kingdom using a cruise missile.
• July 2, 2019: The Yemeni military targets a hangar for military warplanes in the Abha airport. The attack leaves several people injured, according to Yemen’s al-Masirah television network.
• July 7, 2019: Yemeni Armed Forces unveil new domestically-built military hardware, including ballistic and winged missiles in addition to unmanned aerial vehicles (UAV).

Sana’a says the latest equipment could change the balance of power in favor of Yemen.

• August 1, 2019: The Yemeni armed forces say they launched missile and drone attacks on a camp of Saudi-sponsored militiamen loyal to the country’s ex-government in the port city of Aden, killing dozens of them, including a commander.

In a separate attack, Yemeni forces use long-range ballistic missiles to target a military base in the city of Dammam located hundreds of kilometers away from Yemen in Saudi Arabia’s Eastern Province.

• August 2, 2019: Yemeni Armed Forces unveil a new generation of domestically-built Borkan (Volcano) long-range missiles.
• August 5, 2019: The Yemenis fire long-range missiles at the port city of Dammam.
• August 17, 2019: Houthi fighters launch a drone attack on a remote oil and gas field in eastern Saudi Arabia.
• August 25, 2019: The Houthi movement targets an airport and an airbase in southwestern Saudi Arabia with drone attacks.
• August 26, 2019: Yemeni forces use a squadron of Sammad-3 (Invincible-3) combat drones to strike an “important military target” in Riyadh.
• September 14, 2019: The Houthis deploy as many as 10 drones to bomb key oil facilities in Abqaiq and Khurais.

The unprecedented attack has shut down about 50 percent of the kingdom’s crude and gas production, cutting the state oil giant’s crude oil supply by around 5.7 million barrels per day.