Divide and conquer also known as divide and rule were the tactics that Salami used. The Salami tactics were divide and rule or rather divide conquer.

divide and rule

divide by 2

The first rule of math is to add, subtract, multiply, and divide.

Dividing an area for political purpose and rule it properly is called "Divide and rule".

This concept is taken first from the Jews to Muslim. This principle is used in Bangla precedence during the time of British rule in India subcontinent.