The European Union cannot rely on the United States to defend it and must increase military spending and security preparedness to deter Russia from targeting more of its neighbors after Ukraine, senior officials have warned.

The European Union must arm itself to “survive” in an increasingly uncertain global order, Polish Prime Minister Donald Tusk said on Wednesday, calling on the bloc’s member states to boost spending on defense.

Russia is posing an existential threat to the European Union's security and to only way to address that is to increase spending on defence, EU foreign policy chief Kaja Kallas said on Wednesday, adding that the EU had for too long offered Russia alternatives.

Intelligence services, as stated by the EU's chief diplomat Kaja Kallas, warn of a possible Russian attack starting in 2028. "Russia could test EU’s readiness to defend itself in three to five years," said the former Prime Minister of Estonia during an event organized by the European Defense Agency in Brussels.

European Union top diplomat Kaja Kallas warned on Wednesday of a possible attack by Russia in the coming years, as she appealed for defence spending to be boosted. "Many of our national intelligence agencies are giving us the information that Russia could test EU's readiness to defend itself in three to five years,

Slovakia’s pro-Russian prime minister has raised the prospect of his country leaving the European Union and Nato, arguing that world events could consign them to the “history books”.

Slovakia's opposition accused Prime Minister Robert Fico on Tuesday of laying the groundwork to take the country out of the European Union, but dropped its no-confidence motion to dismiss him and his leftist-nationalist government.

Slovak opposition leader Michal Simecka accused Prime Minister Robert Fico of laying the ground to take the country out of the European Union as he launched an attempt to dismiss the leftist-nationalist government in a no-confidence vote on Tuesday.