You don't win a modern war by sending in boatloads of men to slog it out face to face and be killed one at a time or en masse. You don't even win it by firing nuclear missiles at one another.
You win by influencing more people than your enemy does to believe that you are in the right, by persuading them to resist in subtler ways, by resisting yourself all the subtle ways that you are being undermined and infiltrated.
You win by not selling your land piece by piece to wealthy incomers from a land whose leaders have a stated policy of taking over your civilisation.
You win by not buying products from foreign exporters which you could make within your own shores, to local designs, suited to local conditions and using local skills.
You win by treating your producers, both of natural crops and manmade articles, as though they are valuable colleagues, and treating global chain factory-owners as a means to get money from, not as people to be paid money to employ locals to make goods fo the owners to sell and take the profits abroad with them.
You win by making absolutely sure that decision-making within your country is done by the population and its representatives, for the benefit of the whole population, without those decisions being influenced by a fifth column of foreigners with ulterior motives about the outcomes. You further make absolutely sure that the people chosen to represent the population, and the ministers chosen to lead those representatives, are doing so in the interests of the population as a whole and the individuals within in it, not in the interests of their own wealth and power.
If you can do all these things, and choose wise leaders who neither charge impetuously into aggression nor cave in when faced with pressure to conform to what a bully decrees, but can stand firm and out-think and out-talk a wily predator, you will achieve a nation strong enough to follow its own path and not be a victim of war.
It remains to be seen whether this is any longer possible. If it isn't, we are mince.