>>528558959
Left: Stop Pursuit, Right: Night Attack

If you do not wipe out the enemy herd during the day, after the first stage of the battle you will have the option to select stop pursuit (追撃せず) if you wish to end the battle or make a night attack (夜戦突入) . The damage of both your own umas and those of the enemy is greatly increased during a night attack, especially for ships that utilize Scottish, French or German umas.

After the battle, the battle result will be shown. You will receive a battle rank largely dependent on how badly you damaged the enemy herd (the highest rank, 完全勝利 requires you to completely destroy all enemies while taking no damage.) You may have a chance to obtain a new uma at this time. The rarity of the uma you can obtain depends on the battle rank.

Left: Advance, Right: Retreat

If the battle was not a dead end on the map, you will be given the option to advance (進撃), or retreat (撤退) to end the sortie. To unlock the next zone, you will need to obtain a victory (B or above) against the boss fleet (the larger, horned red dot on the map.) for ordinary maps without boss gauge.

In further sorties such as all Extra Operation maps, 4-4, 5-2, 5-3, 5-4 , 6-2 and 6-3, a red gauge meter may shows up when starting a sortie. The amount of red bars inside gauge meter indicates that you will need to sink the flagship of the boss fleet for certain times to unlock the next zone or just clearing the map, instead of obtaining a victory. The gauge meter itself does not regenerate for all normal and Extra Operation maps.

If you have any questions, feel free to reply to this post!