U.S. Ambassador Nikki Haley urged Russia to “immediately cease its unlawful conduct” in the Black Sea off the coast of Crimea, which was illegally annexed by Russia in 2014. “In the name of international peace and security, Russia must immediately cease its unlawful conduct and respect the navigational rights and freedoms of all states,” Haley announced at an emergency meeting of the U.N. Security Council late Monday morning.

In response to the maritime incident, Ukraine’s parliament overwhelmingly voted to impose martial law in the 10 regions bordering Russia. Ukrainian President Petro Poroshenko announced that martial law will last for 30 days, concluding in December, at which time he will assess the need for further action.

Poroshenko openly condemned Russia’s actions, stating, “We consider it as an act of aggression against our state and a very serious threat,” the president said. “Unfortunately, there are no ‘red lines’ for the Russian Federation.” The international community has joined Ukraine in condemning Russia’s actions, with NATO Secretary General Jens Stoltenberg pledging “full support for Ukraine’s territorial integrity” and stating that Russia had “no justification” for the seizure of Ukraine’s ships.

Russian officials dispute the details of the altercation, as the Federal Security Service contends that the skirmish was a justified response to the Ukrainian ships illegally entering territorial waters. Russia’s Border Service released a statement over the weekend, stating, “The vessels are carrying out dangerous maneuvers and are disobeying the Russian authorities’ demands.” Ukraine denies allegations of wrongdoing, citing a 2003 treaty dictating maritime rights and protocol over the Kerch Strait where their ships were detained.

Ultimately, both governments are interpreting the incident as a fabricated aggression in order to discredit the other. Amidst an international backlash over the conflict, an arbitration court in Paris reportedly ruled that Russia owed Ukraine $1.3 billion in damages for the property seized in the annexation of Crimea. Though Russia did not comment on the ruling, they’ve accused the Ukrainian president of using the situation as a “dangerous provocation” that justifies the imposition of martial law, which grants him the power to manipulate Ukraine’s next presidential election, scheduled for March.

It’s true that President Poroshenko is currently far behind his political rival in the polls. Oksana Syroid, a deputy speaker in Ukraine’s parliament, agreed, “Martial law in Ukraine would present a wonderful chance to manipulate the presidential elections.” Aside from increasing the president’s power, martial law would ostensibly allow the government to strengthen air defense and prepare a partial mobilization in the event of a Russian incursion. However, it could also restrict Ukrainians’ civil liberties. For instance, objectors cite parliament’s ambiguous wording in its plans for “strengthening” anti-terrorism measures and “information security.” Three former Ukrainian presidents have already publicly opposed martial law, penning a letter that warns that it could be a “threat to democracy” in a country that found its democratic feet less than 30 years ago.

Martial law is set to begin on Wednesday, November 28. Alleged footage of the maritime clash has been leaked across news outlets and Youtube, found below.

Meg Hanson is a Brooklyn-based writer, teacher, and jaywalker. Find Meg at her website and on Twitter @megsoyung