Final answer:
The National Guard's deployment frequency has changed from its traditional 'one weekend a month, two weeks a year' due to increased military needs, especially since the Iraq War. Members can face more frequent activations and longer annual drill requirements, but deployment duration and frequency depend on a variety of factors.
Step-by-step explanation:
The statement that National Guard men and women can be deployed every other year is not strictly true or false and requires some context to understand fully. The initial slogan of the National Guard service was 'One weekend a month, two weeks a year,' which implied a limited commitment mainly for training purposes. However, since the Iraq War, the deployment of National Guard members has become more frequent, and many served in overseas combat operations. In 2007, nearly 28% of US forces in Iraq and Afghanistan were from the National Guard or other Reserve components. Furthermore, in July 2012, the Army's top general expressed an intention to increase the annual drill requirement to up to seven weeks per year, indicating a potential for more frequent activation and deployment of National Guard members.
Deployments are subject to the needs of the military and can vary based on the political and global context. Also, it is worth noting that the Constitution limits appropriations for raising and supporting armies to a term of no more than two years, reflecting the intention for temporary military service. However, this does not necessarily limit individual deployment lengths for National Guard members, which are dictated by specific operational requirements and policies.