The contract and the secret protocol were signed on February 28. A separate line was the obligation of both parties not to conclude separate treaties with the Poles, and the Treaty of Teusina, concluded 13 years earlier, was also ratified. The secret protocol stipulated that after 3 weeks after the Swedish troops crossed the border, the commander of the Swedish corps Delagardi will be awarded with confirmation letters signed by Skopin-Shuisky, and after another 2 months – letters signed by the tsar. Korela should be transmitted after 11 weeks (that is, simultaneously with the royal letters), on the condition that its inhabitants can leave the city and "go to Russia". Upon the arrival of the Delagardi corps in Novgorod, Skopin-Shuisky really gave him letters of confirmation to the contract and the secret protocol. But two months later the royal letters were not handed over, and the city was not handed over, as the townspeople did not even let the royal ambassadors into the city: After the battle near Tver, a revolt occurred in the Delagardi corps, mainly due to the irregular payment of salaries, most of the mercenaries deserted. The significantly thinned corps went to Valdai, where by autumn Delagardi still received some confirmation from the tsar of the terms of the agreement and two more letters of confirmation from Kalyazin from Skopin-Shuisky addressed to him and the Swedish king. However, even after this the city was not transferred. On December 17, 1609 in Alexandrovskaya Sloboda, Mikhail Skopin-Shuisky and Delagardi entered into an agreement on additional military assistance (confirmed a month later by the tsar), which again referred to Korela's ambulance, and the exchange for additional troops promised "full of Sweden to make a retribution from her it will be required". The Shuisky government, however, did nothing to actually transfer the land, looking through the fingers at the disobedience of the townspeople, and even rewarding them for this: Under various pretexts, the Karelian authorities postponed the implementation of the tsar's order until Shuisky was overthrown. In these conditions, the Swedes decided to take what was promised by force – the Swedish intervention of 1610–1617 began.