With the move, Ms. Ivey joins other Republican governors in dispatching their military forces to help stem the tidal wave of people seeking to cross the border without authorization.

"Every state has become a border state under the current policies," Ms. Ivey said in a statement.

"Alabama remains committed to being an integral part of the mission to protect our Southern Border," she added.

Earlier, Ms. Ivey joined 24 other governors in writing a letter to President Biden on Sept. 19, blaming his policies for incentivizing illegal immigration, which they said had risen exponentially under his watch, "in some areas by nearly 850%."

"States are on the front lines, working around-the clock responding to the effects of this crisis: shelters are full, food pantries empty, law enforcement strained, and aid workers exhausted," Ms. Ivey and the others wrote, citing estimates that the annual cost of illegal immigration at federal, state, and local levels is at least $150.7 billion.