What following strengthened the alliance between the US and Britain?

The alliance between the US and Britain was strengthened by shared values, such as democracy and free markets, as well as common interests in global security. Key events, such as World War II, fostered military collaboration and deepened ties through cooperation in intelligence, notably with the establishment of the "Five Eyes" alliance. Additionally, the post-war era saw economic partnerships through initiatives like the Marshall Plan, further solidifying their relationship.