#security of Ukraine

I am interested in whether the proposal to involve American private military companies to guarantee Ukraine's security in the event of a peace agreement is in line with international law and Ukrainian legislation. What could be the legal consequences of such a decision?

Do you think that the international security guarantees for Ukraine, agreed upon by Trump and European leaders, will be effective without Russia's participation in their development?

Does Ukrainian legislation provide for mechanisms to hold officials accountable for failure to fulfill international security guarantees for Ukraine?