The growing influence of Solidarity was seen as a direct threat to the communist government, and in December 1981, the Polish authorities, under General Wojciech Jaruzelski, declared martial law. Solidarity was outlawed, its leaders, including Wałęsa, were arrested, and the movement was driven underground.
For nearly a decade, Solidarity continued its work in secret, organizing protests, strikes, and distributing underground publications. Despite the repression, the spirit of the movement never died, and the Polish people continued to resist in whatever small ways they could, such as through clandestine meetings and acts of civil disobedience.
Solidarity’s survival during this period was due in part to its deep roots in Polish society and the support of external forces. International pressure mounted on the Polish government, with the Vatican and Pope John Paul II, a Polish native, lending moral support to the cause. Western governments, including the United States, also provided covert financial support to Solidarity and other opposition groups.