By Sabine Siebold MADRID (Reuters) – NATO agreed on Wednesday to put over 300,000 troops at high readiness from 2023, up from 40,000 previously, a new military line-up designed to better counter Russia, the country the alliance has designated as posing the greatest threat. The move replaces the NATO Response Force, which was for years the first to respond to any Russian attack or other crisis. The new model resembles the way NATO forces were organised during the Cold War. At that time, specific allied countries were assigned the defence of specific sectors of the border between Western and Eas…