The PLN 10 billion (EUR 2.35 billion, USD 2.55 billion) project, dubbed "Shield East," is expected to be completed by 2028, officials said.
Planned efforts include the construction of fortifications, telecommunication systems and military infrastructure in partnership with NATO allies such as Finland and the Baltic states of Estonia, Latvia and Lithuania.
"This makes up one complex defence and deterrence system," Polish Defence Minister Władysław Kosiniak-Kamysz said at a news conference on Monday.
"It connects access systems, but we will also buy and develop modern anti-drone and reconnaissance systems," he added.
He described the Shield East initiative as "the largest operation to strengthen Poland's eastern border and NATO's eastern flank since 1945."
Deputy Defence Minister Cezary Tomczyk said the project would kick off in the first quarter of next year and be financed with a mix of national and EU funds.
Kosiniak-Kamysz said last Wednesday that the strategic defence plan was part of a broader effort to bolster Poland’s military readiness amid rising border security challenges, including a significant increase in illegal border crossings.
Poland's border with Russia's Kaliningrad region is just over 200 kilometres long, while the border with Belarus runs to more than 400 kilometres, state news agency PAP has reported.
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Source: IAR, PAP, Reuters