Please improve the cohesiveness of the following paragraph
It has been estimated that only one in ten ships trying to evade the blockade were intercepted. The Union Navy gradually increased in size throughout the war, and was able to drastically reduce shipments into Confederate ports.
It has been estimated that only one in ten ships trying to evade the blockade were intercepted. However, the Union Navy gradually increased in size throughout the war, and was able to drastically reduce shipments into Confederate ports.