Importantly, any effort to increase the number of Russian soldiers based near Estonia would trigger alarm bells across NATO. On first sight of Russian troop movements, Estonia would likely mobilise its reserve and civil defence forces
12/18/25 #EU#NATO#UK In September and October 2025, a string of Russian incursions into NATO airspace—brushing Estonia’s borders, crossing briefly into Romania and violating Polish skies—jolted European capitals.
https://t.co/oBbhoWIuIB
The resulting 15,000 or so ground personnel and 90-100 fighter aircraft offers a reasonable upper bound of what Russia could cobble together for a conventional invasion of Estonia