evidence: At the onset of the Crimean conflict, Russia had roughly 12,000 military personnel from the Black Sea Fleet,[38] in several locations in the Crimean peninsula such as Sevastopol, Kacha, Hvardiiske, Simferopol Raion, Sarych, and others. In 2005 a dispute broke out between Russia and Ukraine over control of the Sarych cape lighthouse near Yalta, and a number of other beacons.[40][41] Russian presence was allowed by the basing and transit agreement with Ukraine. Under this agreement, the Russian military in Crimea was constrained to a maximum of 25,000 troops. Russia was required to respect the sovereignty of Ukraine, honor its legislation, not interfere in the internal affairs of the country, and show their "military identification cards" when crossing the international border.[42] Early in the conflict, the agreement's generous troop limit allowed Russia to significantly strengthen its military presence, deploy special forces and other required capabilities to conduct the operation in Crimea, under the pretext of addressing security concerns.[38]