Fighting in densely populated places would be "horrific, dreadful," according to US Gen Milley.

A Russian invasion of Ukraine, according to US General Mark Milley, would be "horrific" and result in a large number of casualties.

The build-up of 100,000 Russian troops along Ukraine's border, according to Gen. Milley, is the highest since the Cold War. However, US Defense Secretary Lloyd Austin stated that conflict can still be avoided through diplomacy.

Russia denies that it is planning an invasion and claims that US assistance for Ukraine is a threat.

Gen. Mark Milley, US President Joe Biden's most senior military official, cautioned during a Pentagon press briefing on Friday that the size of Russia's forces near its Ukrainian border meant an attack would have serious implications.

"It would be huge, very significant, and it would result in a significant number of casualties if that were unleashed on Ukraine," the chairman of the Joint Chiefs of Staff stated.

Fighting in densely populated places would be "horrific, dreadful," according to Gen Milley.

US Defense Secretary Lloyd Austin stated that the US was committed to assisting Ukraine in its defence, including through the provision of additional armament.

"Conflict is not always inevitable. Diplomacy can still be done if there is time and space "Mr. Austin called for a de-escalation of the situation and urged Russian President Vladimir Putin to do so.

"There's no reason for this to escalate into a war... He may order his men to leave," he continued.