What would happen to this food web if more mice were introduced into the ecosystem? Keeping in mind the fact that there are already mice and more are being added! PLZ ANSWER. Thank u!

the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.