Putin militarily not to be defeated

"Russia could not be defeated militarily, Schröder said, saying, “I
recommend all those who believe to be looking into the history books.”
From Napoleon to Hitler, everyone failed. After initial doubts, the
Russians would be behind their president with a large majority. “They
are convinced that the West is using Ukraine only as a spearhead to
bring Russia to its knees,” he said."
https://www-welt-de.translate.goog/politik/deutschland/article253631702/Gerhard-Schroeder-Ukraine-Loesung-war-nach-Angaben-von-Alt-Kanzler-nahe.html?_x_tr_sl=auto&_x_tr_tl=en&_x_tr_hl=en-US