President Donald Trump announced a new wave of weapons for Ukraine and set a 50-day deadline for Russia to agree to a peace deal or face harsh secondary sanctions aimed at countries still buying Russian oil.

The move marks a sharp turn from his earlier attempts at rapprochement with Russian President Vladimir Putin, raising questions about whether this ultimatum could bring an end to the war or risk escalating it further.

So what does this 50-day ultimatum really mean for the future of the war? Could it push Russia toward negotiations or risk provoking even greater escalation?

On The Big Story, Hongbin Jeong speaks to Markus Wagner, Professor of Law, University of Wollongong, to find out more.