What did the Kerch Strait protest signal on 20 April 2021?

What was the situation around Ukraine's borders on 20 April 2021? Reports from the days before that date point to two parallel developments: a sharp deterioration in relations between Washington and Moscow, and a Ukrainian protest over the Kerch Strait.

Sanctions in Washington

On 15 April 2021, the United States imposed retaliatory measures on Russia. They were a response to the 2020 federal government data breach, interference in the 2020 US elections, and the occupation of and human rights abuses in Crimea. Washington banned trade in bonds newly issued by Russia's Central Bank, National Wealth Fund and Ministry of Finance. It formally named the Russian Foreign Intelligence Service as responsible for the breach, blacklisted 32 Russian entities and individuals, and expelled ten Russian diplomats.

Russia denied the allegations. Its Ministry of Foreign Affairs summoned the US ambassador and told him that a series of retaliatory measures would follow soon. A ministry spokesperson added that a potential summit between the two countries' leaders might not take place.

The breach at the centre of the dispute was later described as among the worst cyber-espionage incidents the United States had suffered, with at least 200 organisations worldwide reported affected, including NATO, the UK government and the European Parliament.

Kyiv's protest

Also on 15 April 2021, Ukraine protested an alleged Russian announcement that, from the following week, it would close the Kerch Strait to foreign warships and state ships until October. The protest placed a maritime restriction in waters next to Crimea on the diplomatic agenda at the same time as the American measures, which themselves cited the occupation of Crimea among their grounds.

Why the overlap mattered

The two items were separate in form: one a package of financial and diplomatic penalties, the other a Ukrainian response to a reported navigation ban. Yet both turned on Russia's conduct and on Crimea. For Kyiv, the American decision to include Crimea among its stated reasons meant the issue was part of a wider confrontation between Moscow and Washington, while Ukraine raised its own objection directly over the strait.

By 20 April 2021, the immediate questions were clear: whether Russia would carry out its promised retaliation, whether the proposed leaders' summit would go ahead, and whether the announced closure of the strait would take effect as described.