Trump's remarks at G7 signal a potential shift in US commitment, alarming European allies who have relied on American protection for decades.
Germany deploys troops to Lithuania, welcomed as a deterrent against Russian aggression, marking a historic shift in regional security.
European leaders express wariness and seek clarity following President Trump's pledge to send 5,000 troops to Poland.
US to withdraw 5,000 troops from Germany, but thousands will remain stationed in the key European nation.
Germany's increased military spending and strategic autonomy are lessening the impact of potential U.S. troop withdrawals.