At the order of Mikhail Skopin-Shuisky, Grigory Valuyev (together with Semyon Golovin, Prince Yakov Baryatinsky, and David Zherebtsov) had to prevent the Lithuanian forces from crossing the Zhabyn River.

On 9 January 1610 Mikhail Skopin-Shuisky sent Grigory Valuyev with 500 soldiers to assist in relieving the Siege of Troitse-Sergiyeva Lavra, laid by Polish commanders Jan Piotr Sapieha and Aleksander Józef Lisowski.

After Mikhail Skopin-Shuisky’s sudden death in April 1610, Valuyev was transferred under the command of Dmitry Shuisky and sent to defend the western borders from the army of Hetman Stanisław Żółkiewski.

After that, Valuyev and Prince Fyodor Yeletsky were put in charge of a unit stationed in a village of Tsaryovo-Zaymishche and responsible for providing cover for the army of Dmitry Shuisky (located near Mozhaysk).

Grigory Valuyev and Fyodor Yeletsky decided to capitulate and swore allegiance to Władysław IV Vasa on the conditions specified earlier by a Russian voyevoda and statesman Mikhail Glebovich Saltykov during his negotiations with Sigismund III Vasa (those conditions were as follows: 1) release of all Russian prisoners, 2) in case Władysław takes control over Smolensk, Sigismund must abandon the city without causing any destruction or violence, 3) there will be no Catholicism in Russia).