What diplomatic move did Germany make regarding its borders in the Locarno Treaties?

Germany's diplomatic move in the Locarno Treaties focused on securing its western borders. Signed in 1925, the treaties involved Germany, France, Belgium, Italy, and Britain, and they were aimed at ensuring peace in Western Europe following the devastation of World War I. By guaranteeing its western borders specifically against France and Belgium, Germany sought to foster stability and improve relations with these nations. This was also seen as a means to reinforce the post-war settlement established by the Treaty of Versailles, thus minimizing the potential for conflict in Western Europe.

The other choices relate to broader geopolitical dynamics but do not reflect the specific commitments made by Germany in the context of the Locarno Treaties. Establishing defenses against Soviet threats pertains more to the Eastern front and the concerns of neighboring countries during the interwar period. Alliances with Eastern European nations or promoting disarmament in that region does not accurately capture the essence of the discussions or agreements made in Locarno, which were predominantly focused on the western border arrangements and peace treaties in the context of Western Europe.