Your question seems to have the answer itself.
Although, it matters on persepective.
War is not necessary to prove the strength of a country. There are many other ways to measure a country's strength, such as its economic power, its military capabilities, and its diplomatic influence. In fact, war can actually weaken a country, as it can lead to loss of life, destruction of infrastructure, and economic hardship.
The idea that war is necessary to prove a country's strength is a dangerous one. It can lead to countries becoming more aggressive and more likely to go to war. It can also lead to the glorification of war, which can make it more difficult to achieve peace.
There are many other ways to show the strength of a country. These include:
* Investing in education and healthcare
* Promoting economic development
* Protecting human rights
* Promoting democracy and good governance
* Building strong international relationships
These are all ways to show that a country is strong and prosperous, without resorting to war.
In the 21st century, we should be moving away from the idea that war is necessary to prove a country's strength. We should be working together to build a more peaceful world, where all countries can prosper without resorting to violence.