Baratov sold Dunsterville most of the weapons and supplies of the Russian Army but some were also traded by Russian soldiers to the Persian locals and the Kurdish hill peoples, leaving them exceptionally well armed. By the end of March, all but the Bicherakov Cossack detachment at Kazvin had withdrawn and the MEF extended its hold on the road to Kermanshah, with the 36th Brigade. Dunsterville borrowed some infantry and cavalry and Bicherakov agreed to remain at Kazvin, until British troops could take over. Twenty officers and twenty NCOs of Dunsterforce arrived by Ford car on 3 April, the rest of the force making their way on foot with a mule train, all arriving by 25 May. By the time that the rest of Dunsterforce had arrived, the local and international situation had changed; the success of the German spring offensive in France leading the Georgians to bid for German support; in May the Germans took over part of the Russian Black Sea Fleet. The Ottomans repudiated the treaty of Brest Litovsk and began to organise Tartars into the Islamic Army of the Caucasus on 25 May, to attack Baku and Iran, making a British move to Tiflis even less likely.