Medics provide assistance in a vehicle in Russia's Kursk region in August 2024.Kommersant Photo/Anatoliy Zhdanov via REUTERSUkraine has continued its invasion of Russia's Kursk region, where it is holding territory.An aim as Ukraine's forces ready for a long fight may be to "bleed" Russian troops, an expert said.Russia's losses in its war are high, with UK intelligence saying 70,000 Russians were likely lost in two months.Ukraine's stated commitment to holding territory in Russia's Kursk region could give its forces the chance to "bleed" the Russians by drawing them into a grinding, attritional fight like the Ukrainians have on their own soil, a warfare expert told Business Insider.The Ukrainians launched their shock assault into western Russia on August 6, and as of last week, per the military's estimates, controlled almost 500 square miles.