How could the arrival of ATACMS impact war in Ukraine?

Ukraine's military has used the US-provided long-range Army Tactical Missile System (ATACMS) for the first time.

In his nightly address, President Zelensky confirmed that the ATACMS "have proven themselves".

The missiles, which can strike targets 100 miles or more away, are believed to have been used against a military airfield in Berdiansk and another one in the Luhansk region – destroying nine Russian military helicopters, an anti-aircraft missile system and an ammunition warehouse.

• Ukraine uses US-supplied ATACMS for first time, Zelensky says
• ATACMS: US' precision-guided missiles designed to strike deep behind enemy lines
• What is HIMARS? The weapons system the US has supplied to Ukraine explained

In the video above, Simon Newton explains how the arrival of ATACMS could impact the war in Ukraine.