俄警告欧洲国家：军队出现在乌克兰，将成为合法目标

Group 1 - The core viewpoint of the article is that Russian Foreign Minister Lavrov stated that any "volunteer coalition" military presence from Europe in Ukraine would be considered a legitimate target for Russian armed forces [1] - Lavrov criticized European politicians for being blinded by their ambitions, indicating a strong stance against foreign military involvement in Ukraine [1] - In mid-December, leaders from multiple European countries declared that security guarantees for Ukraine should include the formation of a European-led "multinational force" [1] Group 2 - UK Defense Secretary John Healey mentioned that countries participating in the "volunteer coalition" have increased their military readiness in response to potential troop deployments to Ukraine [1]