From the initiation of reparations, German coal deliveries were below the level agreed. In an attempt to rectify this situation, the Spa Conference was held in July 1920. At this conference it was decided that Germany would be paid five marks per coal ton delivered to facilitate coal shipments and help feed the miners. Despite this, Germany continued to default on her obligations. By late 1922, the German defaults on payments had grown so serious and regular that a crisis engulfed the Reparations Commission. French and Belgian delegates urged the seizure of the Ruhr to encourage the Germans to make more effort to pay, while the British supported postponing payments to facilitate the financial reconstruction of Germany. On 26 December 1922, Germany defaulted on timber deliveries. The timber quota was based upon a German proposal and the default was massive. The Allies were unanimous that the default was in bad faith. In January 1923, despite quota reductions, the German Government defaulted on coal deliveries for the 34th time in three years following the loss of the Upper Silesian coal fields containing 11 per cent of German coal resources, which had been transferred to Poland.