In April, Russia conducted a massive military buildup about 100 miles from its border with Ukraine, which increased tensions, stoked fighting between Ukrainian and separatist forces, and worried many that another invasion was imminent.
Russia's War Against Ukraine
Business Insider: Ukraine modernizing military to make a war more costly for Russia
This handout picture taken and released by Ukraine's Security Service on April 14, 2021 shows a Security Service special troops serviceman hanging from an helicopter during a large-scale anti-terrorism exercises in Kherson region of the country.
