Ukraine’s top national security official asked earlier this month for the U.S. to go beyond traditional military aid and provide the country with the funding, training and weaponry to support a long-term resistance movement, according to a letter obtained by Axios…

Ukraine’s parliament last year codified a plan to fight back against a potential Russian invasion and occupation with its Law on the Fundamentals of National Resistance. It came into effect Jan. 1.

The law sets out the role of the Territorial Defense Forces, a reserve unit that supports the military, as well as irregular partisan forces and local volunteer formations comprised of civilians.

If necessary, the law would “allow for the involvement of the entire population of Ukraine in the protection of their homeland, their land and their families,” Maria Mezentseva, a Ukrainian member of Parliament, tells Axios.