Perhaps due to the rightful reason the Union had this time, there were many more countries involved in the war. Furthermore, the army was more singular than last time. It was made up of mostly US soldiers.
This was because everyone knew that the US would get all the spoils of the war in the end. Likewise, the US didn't really expect these countries to give real military support.
It was impossible that the US would divide the earned land. They would at most share some of the technological items they got with the condition that these countries would support publicly the US.
Because it was only the US Army attacking, they could only go in through the Malacca Strait and Yi Ta Strait into the Indian Ocean.
This was because Luo Yue had given up on Jason Miambi Island to reduce losses. If Luo Yue hadn't done that, the US fleet would have had to enter from the Malacca Strait.
The land army could only invade from Ethiopia and Kenya. There was no other way.
