Pitched Battle of the Three Forces

With Alexis’s defeat of the Sea King Erik, the Pact rises as the third power in addition to the Alliance and the Union. Siluca proposes a truce between the Union and the Alliance, but Marrine refuses adamantly and instead instigates an all-out war against them.
A war of the Alliance against the Union and the Pact is unleashed. However, the Union army will not arrive at the battlefield until noon the following day. Will the Pact army of 25,000 be able to hold off the Alliance army of 40,000 until the Union arrives?