This bill sets U.S. defense policy and approves major military spending for 2027. It authorizes buying more ships, aircraft, missiles, and drones, and invests in cyber, artificial intelligence (AI), space, and nuclear programs. The bill funds base construction, housing repairs, and expanded benefits for service members, including child care, health care, and fertility services. To address security risks, it tightens rules on Chinese-linked technology in military systems and expands cooperation with allies. It also supports upgrades to the defense industrial base, research on next-generation weaponry, and measures to improve quality of life for military families.